Add levelling up mechanics through experience gained via killing enemies

src/core/config/GameConfig.ts

@@ -1,10 +1,20 @@
 export const GAME_CONFIG = {
   player: {
-    initialStats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+    initialStats: { 
+      maxHp: 20, 
+      hp: 20, 
+      attack: 5, 
+      defense: 2,
+      level: 1,
+      exp: 0,
+      expToNextLevel: 10
+    },
     speed: 100,
     viewRadius: 8
   },
 
+
+  
   map: {
     width: 60,
     height: 40,
@@ -17,18 +27,26 @@ export const GAME_CONFIG = {
   },
   
   enemy: {
-    baseHpPerLevel: 2,
     baseHp: 8,
     baseAttack: 3,
-    attackPerTwoLevels: 1,
     minSpeed: 80,
     maxSpeed: 130,
-    maxDefense: 2,
+    baseHpPerFloor: 5,
-    baseCountPerLevel: 1,
+    attackPerTwoFloors: 1,
     baseCount: 3,
-    randomBonus: 4
+    baseCountPerFloor: 3,
+    ratExp: 5,
+    batExp: 8
   },
   
+  leveling: {
+    baseExpToNextLevel: 10,
+    expMultiplier: 1.5,
+    hpGainPerLevel: 5,
+    attackGainPerLevel: 1
+  },
+
+  
   rendering: {
     tileSize: 16,
     cameraZoom: 2,
@@ -38,6 +56,9 @@ export const GAME_CONFIG = {
     playerColor: 0x66ff66,
     enemyColor: 0xff6666,
     pathPreviewColor: 0x3355ff,
+    expOrbColor: 0x33ccff,
+    expTextColor: 0x33ccff,
+    levelUpColor: 0xffff00,
     fogAlphaFloor: 0.15,
     fogAlphaWall: 0.35,
     visibleMinAlpha: 0.35,
@@ -45,6 +66,7 @@ export const GAME_CONFIG = {
     visibleStrengthFactor: 0.65
   },
 
+
   terrain: {
     empty: 1,
     wall: 4,

src/core/types.ts

@@ -13,16 +13,25 @@ export type SimEvent =
   | { type: "moved"; actorId: EntityId; from: Vec2; to: Vec2 }
   | { type: "attacked"; attackerId: EntityId; targetId: EntityId }
   | { type: "damaged"; targetId: EntityId; amount: number; hp: number; x: number; y: number }
-  | { type: "killed"; targetId: EntityId; killerId: EntityId; x: number; y: number; victimType?: "player" | "rat" | "bat" }
+  | { type: "killed"; targetId: EntityId; killerId: EntityId; x: number; y: number; victimType?: "player" | "rat" | "bat" | "exp_orb" }
-  | { type: "waited"; actorId: EntityId };
+
+  | { type: "waited"; actorId: EntityId }
+  | { type: "exp-collected"; actorId: EntityId; amount: number; x: number; y: number }
+  | { type: "orb-spawned"; orbId: EntityId; x: number; y: number }
+  | { type: "leveled-up"; actorId: EntityId; level: number; x: number; y: number };
+
 
 export type Stats = {
   maxHp: number;
   hp: number;
   attack: number;
   defense: number;
+  level: number;
+  exp: number;
+  expToNextLevel: number;
 };
 
+
 export type Inventory = {
   gold: number;
   items: string[];
@@ -36,8 +45,9 @@ export type RunState = {
 export type Actor = {
   id: EntityId;
   isPlayer: boolean;
-  type?: "player" | "rat" | "bat";
+  type?: "player" | "rat" | "bat" | "exp_orb";
   pos: Vec2;
+
   speed: number;
   energy: number;
 

src/engine/__tests__/world.test.ts

@@ -1,6 +1,8 @@
 import { describe, it, expect } from 'vitest';
 import { idx, inBounds, isWall, isBlocked } from '../world/world-logic';
 import { type World, type Tile } from '../../core/types';
+import { GAME_CONFIG } from '../../core/config/GameConfig';
+
 
 describe('World Utilities', () => {
   const createTestWorld = (width: number, height: number, tiles: Tile[]): World => ({
@@ -44,9 +46,10 @@ describe('World Utilities', () => {
 
   describe('isWall', () => {
     it('should return true for wall tiles', () => {
-      const tiles: Tile[] = new Array(100).fill(0);
+      const tiles: Tile[] = new Array(100).fill(GAME_CONFIG.terrain.empty);
-      tiles[0] = 1; // wall at 0,0
+      tiles[0] = GAME_CONFIG.terrain.wall; // wall at 0,0
-      tiles[55] = 1; // wall at 5,5
+      tiles[55] = GAME_CONFIG.terrain.wall; // wall at 5,5
+
       
       const world = createTestWorld(10, 10, tiles);
       
@@ -55,11 +58,12 @@ describe('World Utilities', () => {
     });
 
     it('should return false for floor tiles', () => {
-      const tiles: Tile[] = new Array(100).fill(0);
+      const tiles: Tile[] = new Array(100).fill(GAME_CONFIG.terrain.empty);
       const world = createTestWorld(10, 10, tiles);
       
       expect(isWall(world, 3, 3)).toBe(false);
       expect(isWall(world, 7, 7)).toBe(false);
+
     });
 
     it('should return false for out of bounds coordinates', () => {
@@ -72,8 +76,9 @@ describe('World Utilities', () => {
 
   describe('isBlocked', () => {
     it('should return true for walls', () => {
-      const tiles: Tile[] = new Array(100).fill(0);
+      const tiles: Tile[] = new Array(100).fill(GAME_CONFIG.terrain.empty);
-      tiles[55] = 1; // wall at 5,5
+      tiles[55] = GAME_CONFIG.terrain.wall; // wall at 5,5
+
       
       const world = createTestWorld(10, 10, tiles);
       

src/engine/simulation/simulation.ts

@@ -1,6 +1,8 @@
-import { ACTION_COST, ENERGY_THRESHOLD } from "../../core/constants";
 import type { World, EntityId, Action, SimEvent, Actor } from "../../core/types";
+
 import { isBlocked } from "../world/world-logic";
+import { GAME_CONFIG } from "../../core/config/GameConfig";
+
 
 export function applyAction(w: World, actorId: EntityId, action: Action): SimEvent[] {
   const actor = w.actors.get(actorId);
@@ -22,11 +24,59 @@ export function applyAction(w: World, actorId: EntityId, action: Action): SimEve
   }
 
   // Spend energy for any action (move/wait/attack)
-  actor.energy -= ACTION_COST;
+  actor.energy -= GAME_CONFIG.gameplay.actionCost;
 
   return events;
 }
 
+function handleExpCollection(w: World, player: Actor, events: SimEvent[]) {
+  const orbs = [...w.actors.values()].filter(a => a.type === "exp_orb" && a.pos.x === player.pos.x && a.pos.y === player.pos.y);
+  
+  for (const orb of orbs) {
+    const amount = (orb as any).expAmount || 0;
+    if (player.stats) {
+      player.stats.exp += amount;
+      events.push({ 
+        type: "exp-collected", 
+        actorId: player.id, 
+        amount, 
+        x: player.pos.x, 
+        y: player.pos.y 
+      });
+      
+      checkLevelUp(player, events);
+    }
+    w.actors.delete(orb.id);
+  }
+}
+
+function checkLevelUp(player: Actor, events: SimEvent[]) {
+  if (!player.stats) return;
+  const s = player.stats;
+  
+  while (s.exp >= s.expToNextLevel) {
+    s.level++;
+    s.exp -= s.expToNextLevel;
+    
+    // Growth
+    s.maxHp += GAME_CONFIG.leveling.hpGainPerLevel;
+    s.hp = s.maxHp; // Heal on level up
+    s.attack += GAME_CONFIG.leveling.attackGainPerLevel;
+    
+    // Scale requirement
+    s.expToNextLevel = Math.floor(s.expToNextLevel * GAME_CONFIG.leveling.expMultiplier);
+    
+    events.push({ 
+      type: "leveled-up", 
+      actorId: player.id, 
+      level: s.level, 
+      x: player.pos.x, 
+      y: player.pos.y 
+    });
+  }
+}
+
+
 function handleMove(w: World, actor: Actor, action: { dx: number; dy: number }): SimEvent[] {
   const from = { ...actor.pos };
   const nx = actor.pos.x + action.dx;
@@ -36,12 +86,19 @@ function handleMove(w: World, actor: Actor, action: { dx: number; dy: number }):
     actor.pos.x = nx;
     actor.pos.y = ny;
     const to = { ...actor.pos };
-    return [{ type: "moved", actorId: actor.id, from, to }];
+    const events: SimEvent[] = [{ type: "moved", actorId: actor.id, from, to }];
+    
+    if (actor.isPlayer) {
+      handleExpCollection(w, actor, events);
+    }
+    
+    return events;
   } else {
     return [{ type: "waited", actorId: actor.id }];
   }
 }
 
+
 function handleAttack(w: World, actor: Actor, action: { targetId: EntityId }): SimEvent[] {
   const target = w.actors.get(action.targetId);
   if (target && target.stats && actor.stats) {
@@ -69,12 +126,29 @@ function handleAttack(w: World, actor: Actor, action: { targetId: EntityId }): S
         victimType: target.type 
       });
       w.actors.delete(target.id);
+
+      // Spawn EXP Orb
+      const expAmount = target.type === "rat" ? GAME_CONFIG.enemy.ratExp : GAME_CONFIG.enemy.batExp;
+      const orbId = Math.max(0, ...w.actors.keys(), target.id) + 1;
+      w.actors.set(orbId, {
+
+        id: orbId,
+        isPlayer: false,
+        type: "exp_orb",
+        pos: { ...target.pos },
+        speed: 0,
+        energy: 0,
+        expAmount // Hidden property for simulation
+      } as any);
+
+      events.push({ type: "orb-spawned", orbId, x: target.pos.x, y: target.pos.y });
     }
     return events;
   }
   return [{ type: "waited", actorId: actor.id }];
 }
 
+
 /**
  * Very basic enemy AI:
  * - if adjacent to player, attack
@@ -120,11 +194,12 @@ export function stepUntilPlayerTurn(w: World, playerId: EntityId): { awaitingPla
   const events: SimEvent[] = [];
 
   while (true) {
-    while (![...w.actors.values()].some(a => a.energy >= ENERGY_THRESHOLD)) {
+    while (![...w.actors.values()].some(a => a.energy >= GAME_CONFIG.gameplay.energyThreshold)) {
       for (const a of w.actors.values()) a.energy += a.speed;
     }
 
-    const ready = [...w.actors.values()].filter(a => a.energy >= ENERGY_THRESHOLD);
+    const ready = [...w.actors.values()].filter(a => a.energy >= GAME_CONFIG.gameplay.energyThreshold);
+
     ready.sort((a, b) => (b.energy - a.energy) || (a.id - b.id));
     const actor = ready[0];
 

src/engine/world/generator.ts

@@ -12,16 +12,16 @@ interface Room {
 
 /**
  * Generates a procedural dungeon world with rooms and corridors
- * @param level The level number (affects difficulty and randomness seed)
+ * @param floor The floor number (affects difficulty)
- * @param runState Player's persistent state across levels
+ * @param runState Player's persistent state across floors
  * @returns Generated world and player ID
  */
-export function generateWorld(level: number, runState: RunState): { world: World; playerId: EntityId } {
+export function generateWorld(floor: number, runState: RunState): { world: World; playerId: EntityId } {
   const width = GAME_CONFIG.map.width;
   const height = GAME_CONFIG.map.height;
-  const tiles: Tile[] = new Array(width * height).fill(GAME_CONFIG.terrain.wall); // Start with all walls
+  const tiles: Tile[] = new Array(width * height).fill(GAME_CONFIG.terrain.wall);
 
-  const random = seededRandom(level * 12345);
+  const random = seededRandom(floor * 12345);
 
   const rooms = generateRooms(width, height, tiles, random);
   
@@ -30,15 +30,9 @@ export function generateWorld(level: number, runState: RunState): { world: World
   const playerX = firstRoom.x + Math.floor(firstRoom.width / 2);
   const playerY = firstRoom.y + Math.floor(firstRoom.height / 2);
   
-  // Place exit in last room
-  const lastRoom = rooms[rooms.length - 1];
-  const exitX = lastRoom.x + Math.floor(lastRoom.width / 2);
-  const exitY = lastRoom.y + Math.floor(lastRoom.height / 2);
-  const exit: Vec2 = { x: exitX, y: exitY };
-
   const actors = new Map<EntityId, Actor>();
-
   const playerId = 1;
+  
   actors.set(playerId, {
     id: playerId,
     isPlayer: true,
@@ -50,13 +44,23 @@ export function generateWorld(level: number, runState: RunState): { world: World
     inventory: { gold: runState.inventory.gold, items: [...runState.inventory.items] }
   });
 
-  placeEnemies(level, rooms, actors, random);
+  // Place exit in last room
+  const lastRoom = rooms[rooms.length - 1];
+  const exit: Vec2 = {
+    x: lastRoom.x + Math.floor(lastRoom.width / 2),
+    y: lastRoom.y + Math.floor(lastRoom.height / 2)
+  };
 
+  placeEnemies(floor, rooms, actors, random);
   decorate(width, height, tiles, random, exit);
   
-  return { world: { width, height, tiles, actors, exit }, playerId };
+  return { 
+    world: { width, height, tiles, actors, exit }, 
+    playerId 
+  };
 }
 
+
 function generateRooms(width: number, height: number, tiles: Tile[], random: () => number): Room[] {
   const rooms: Room[] = [];
   const numRooms = GAME_CONFIG.map.minRooms + Math.floor(random() * (GAME_CONFIG.map.maxRooms - GAME_CONFIG.map.minRooms + 1));
@@ -204,9 +208,9 @@ function generatePatch(width: number, height: number, fillChance: number, iterat
   return map;
 }
 
-function placeEnemies(level: number, rooms: Room[], actors: Map<EntityId, Actor>, random: () => number): void {
+function placeEnemies(floor: number, rooms: Room[], actors: Map<EntityId, Actor>, random: () => number): void {
   let enemyId = 2;
-  const numEnemies = GAME_CONFIG.enemy.baseCount + level * GAME_CONFIG.enemy.baseCountPerLevel + Math.floor(random() * GAME_CONFIG.enemy.randomBonus);
+  const numEnemies = GAME_CONFIG.enemy.baseCount + floor * GAME_CONFIG.enemy.baseCountPerFloor; // Simplified for now
   
   for (let i = 0; i < numEnemies && i < rooms.length - 1; i++) {
     const roomIdx = 1 + Math.floor(random() * (rooms.length - 1));
@@ -215,8 +219,8 @@ function placeEnemies(level: number, rooms: Room[], actors: Map<EntityId, Actor>
     const enemyX = room.x + 1 + Math.floor(random() * (room.width - 2));
     const enemyY = room.y + 1 + Math.floor(random() * (room.height - 2));
     
-    const baseHp = GAME_CONFIG.enemy.baseHp + level * GAME_CONFIG.enemy.baseHpPerLevel;
+    const baseHp = GAME_CONFIG.enemy.baseHp + floor * GAME_CONFIG.enemy.baseHpPerFloor;
-    const baseAttack = GAME_CONFIG.enemy.baseAttack + Math.floor(level / 2) * GAME_CONFIG.enemy.attackPerTwoLevels;
+    const baseAttack = GAME_CONFIG.enemy.baseAttack + Math.floor(floor / 2) * GAME_CONFIG.enemy.attackPerTwoFloors;
     
     actors.set(enemyId, {
       id: enemyId,
@@ -229,11 +233,15 @@ function placeEnemies(level: number, rooms: Room[], actors: Map<EntityId, Actor>
         maxHp: baseHp + Math.floor(random() * 4),
         hp: baseHp + Math.floor(random() * 4),
         attack: baseAttack + Math.floor(random() * 2),
-        defense: Math.floor(random() * (GAME_CONFIG.enemy.maxDefense + 1))
+        defense: 0,
+        level: 0,
+        exp: 0,
+        expToNextLevel: 0
       }
     });
     enemyId++;
   }
 }
 
+
 export const makeTestWorld = generateWorld;

src/engine/world/world-logic.ts

@@ -19,11 +19,12 @@ export function isBlocked(w: World, x: number, y: number): boolean {
   if (isWall(w, x, y)) return true;
 
   for (const a of w.actors.values()) {
-    if (a.pos.x === x && a.pos.y === y) return true;
+    if (a.pos.x === x && a.pos.y === y && a.type !== "exp_orb") return true;
   }
   return false;
 }
 
+
 export function isPlayerOnExit(w: World, playerId: EntityId): boolean {
   const p = w.actors.get(playerId);
   if (!p) return false;

src/rendering/DungeonRenderer.ts

@@ -12,8 +12,10 @@ export class DungeonRenderer {
   
   private playerSprite?: Phaser.GameObjects.Sprite;
   private enemySprites: Map<EntityId, Phaser.GameObjects.Sprite> = new Map();
+  private orbSprites: Map<EntityId, Phaser.GameObjects.Arc> = new Map();
   private corpseSprites: Phaser.GameObjects.Sprite[] = [];
 
+  
   // FOV
   private fov!: any;
   private seen!: Uint8Array;
@@ -52,7 +54,8 @@ export class DungeonRenderer {
     this.minimapContainer.setVisible(false);
   }
 
-  initializeLevel(world: World) {
+  initializeFloor(world: World) {
+
     this.world = world;
     this.seen = new Uint8Array(this.world.width * this.world.height);
     this.visible = new Uint8Array(this.world.width * this.world.height);
@@ -277,6 +280,41 @@ export class DungeonRenderer {
       }
     }
 
+    // Orbs
+    const activeOrbIds = new Set<EntityId>();
+    for (const a of this.world.actors.values()) {
+      if (a.type !== "exp_orb") continue;
+      
+      const i = idx(this.world, a.pos.x, a.pos.y);
+      // PD usually shows items only when visible or seen. Let's do visible.
+      const isVis = this.visible[i] === 1;
+
+      
+      if (!isVis) continue;
+
+      activeOrbIds.add(a.id);
+      let orb = this.orbSprites.get(a.id);
+      if (!orb) {
+        orb = this.scene.add.circle(0, 0, 4, GAME_CONFIG.rendering.expOrbColor);
+        orb.setStrokeStyle(1, 0xffffff, 0.5);
+        orb.setDepth(45);
+        this.orbSprites.set(a.id, orb);
+      }
+      orb.setPosition(a.pos.x * TILE_SIZE + TILE_SIZE / 2, a.pos.y * TILE_SIZE + TILE_SIZE / 2);
+      orb.setVisible(true);
+    }
+
+    for (const [id, orb] of this.orbSprites.entries()) {
+      if (!activeOrbIds.has(id)) {
+        orb.setVisible(false);
+        if (!this.world.actors.has(id)) {
+          orb.destroy();
+          this.orbSprites.delete(id);
+        }
+      }
+    }
+
+
     this.renderMinimap();
   }
 
@@ -355,8 +393,10 @@ export class DungeonRenderer {
     });
   }
 
-  spawnCorpse(x: number, y: number, type: "player" | "rat" | "bat") {
+  spawnCorpse(x: number, y: number, type: "player" | "rat" | "bat" | "exp_orb") {
+    if (type === "exp_orb") return;
     const textureKey = type === "player" ? "warrior" : type;
+
     const corpse = this.scene.add.sprite(
       x * TILE_SIZE + TILE_SIZE / 2,
       y * TILE_SIZE + TILE_SIZE / 2,
@@ -389,4 +429,54 @@ export class DungeonRenderer {
       onComplete: () => text.destroy()
     });
   }
+
+  spawnOrb(_orbId: EntityId, _x: number, _y: number) {
+    // Just to trigger a render update if needed, but render() handles it
+  }
+
+  collectOrb(_actorId: EntityId, amount: number, x: number, y: number) {
+
+    const screenX = x * TILE_SIZE + TILE_SIZE / 2;
+    const screenY = y * TILE_SIZE;
+
+    const text = this.scene.add.text(screenX, screenY, `+${amount} EXP`, {
+      fontSize: "14px",
+      color: "#" + GAME_CONFIG.rendering.expTextColor.toString(16),
+      stroke: "#000",
+      strokeThickness: 2,
+      fontStyle: "bold"
+    }).setOrigin(0.5, 1).setDepth(200);
+
+    this.scene.tweens.add({
+      targets: text,
+      y: screenY - 32,
+      alpha: 0,
+      duration: 1000,
+      ease: "Power1",
+      onComplete: () => text.destroy()
+    });
+  }
+
+  showLevelUp(x: number, y: number) {
+    const screenX = x * TILE_SIZE + TILE_SIZE / 2;
+    const screenY = y * TILE_SIZE;
+
+    const text = this.scene.add.text(screenX, screenY - 16, "+1 LVL", {
+      fontSize: "20px",
+      color: "#" + GAME_CONFIG.rendering.levelUpColor.toString(16),
+      stroke: "#000",
+      strokeThickness: 3,
+      fontStyle: "bold"
+    }).setOrigin(0.5, 1).setDepth(210);
+
+    this.scene.tweens.add({
+      targets: text,
+      y: screenY - 60,
+      alpha: 0,
+      duration: 1500,
+      ease: "Cubic.out",
+      onComplete: () => text.destroy()
+    });
+  }
 }
+

src/rendering/__tests__/DungeonRenderer.test.ts

@@ -94,6 +94,17 @@ describe('DungeonRenderer', () => {
         exists: vi.fn().mockReturnValue(true),
         generateFrameNumbers: vi.fn(),
       },
+      make: {
+        tilemap: vi.fn().mockReturnValue({
+          addTilesetImage: vi.fn().mockReturnValue({}),
+          createLayer: vi.fn().mockReturnValue({
+            setDepth: vi.fn(),
+            forEachTile: vi.fn(),
+          }),
+          destroy: vi.fn(),
+        }),
+      },
+
     };
 
     mockWorld = {
@@ -107,8 +118,9 @@ describe('DungeonRenderer', () => {
     renderer = new DungeonRenderer(mockScene);
   });
 
-  it('should track and clear corpse sprites on level initialization', () => {
+  it('should track and clear corpse sprites on floor initialization', () => {
-    renderer.initializeLevel(mockWorld);
+    renderer.initializeFloor(mockWorld);
+
 
     // Spawn a couple of corpses
     renderer.spawnCorpse(1, 1, 'rat');
@@ -120,8 +132,9 @@ describe('DungeonRenderer', () => {
 
     expect(mockScene.add.sprite).toHaveBeenCalledTimes(3);
 
-    // Initialize level again (changing level)
+    // Initialize floor again (changing level)
-    renderer.initializeLevel(mockWorld);
+    renderer.initializeFloor(mockWorld);
+
 
     // Verify destroy was called on both corpse sprites
     expect(corpse1.destroy).toHaveBeenCalledTimes(1);

src/scenes/GameScene.ts

@@ -10,7 +10,8 @@ import { TILE_SIZE } from "../core/constants";
 import { inBounds, isBlocked, isPlayerOnExit } from "../engine/world/world-logic";
 import { findPathAStar } from "../engine/world/pathfinding";
 import { applyAction, stepUntilPlayerTurn } from "../engine/simulation/simulation";
-import { makeTestWorld } from "../engine/world/generator";
+import { generateWorld } from "../engine/world/generator";
+
 import { DungeonRenderer } from "../rendering/DungeonRenderer";
 import { GAME_CONFIG } from "../core/config/GameConfig";
 
@@ -18,7 +19,8 @@ export class GameScene extends Phaser.Scene {
   private world!: World;
   private playerId!: EntityId;
 
-  private levelIndex = 1;
+  private floorIndex = 1;
+  private gameState: "playing" | "player-turn" | "enemy-turn" = "player-turn";
 
   private runState: RunState = {
     stats: { ...GAME_CONFIG.player.initialStats },
@@ -62,8 +64,8 @@ export class GameScene extends Phaser.Scene {
       this.isMenuOpen = isOpen;
     });
 
-    // Load initial level
+    // Load initial floor
-    this.loadLevel(1);
+    this.loadFloor(1);
 
     // Menu Inputs
     this.input.keyboard?.on("keydown-I", () => {
@@ -214,7 +216,7 @@ export class GameScene extends Phaser.Scene {
       this.events.emit("update-ui", {
           world: this.world,
           playerId: this.playerId,
-          levelIndex: this.levelIndex
+          floorIndex: this.floorIndex
       });
   }
 
@@ -237,16 +239,23 @@ export class GameScene extends Phaser.Scene {
          if (player) {
            this.dungeonRenderer.showWait(player.pos.x, player.pos.y);
          }
+      } else if (ev.type === "orb-spawned") {
+         this.dungeonRenderer.spawnOrb(ev.orbId, ev.x, ev.y);
+      } else if (ev.type === "exp-collected" && ev.actorId === this.playerId) {
+         this.dungeonRenderer.collectOrb(ev.actorId, ev.amount, ev.x, ev.y);
+      } else if (ev.type === "leveled-up" && ev.actorId === this.playerId) {
+         this.dungeonRenderer.showLevelUp(ev.x, ev.y);
       }
     }
 
+
     // Check if player died
     if (!this.world.actors.has(this.playerId)) {
       this.syncRunStateFromPlayer(); // Save final stats for death screen
       const uiScene = this.scene.get("GameUI") as any;
       if (uiScene) {
         uiScene.showDeathScreen({
-          level: this.levelIndex,
+          floor: this.floorIndex,
           gold: this.runState.inventory.gold,
           stats: this.runState.stats
         });
@@ -257,7 +266,8 @@ export class GameScene extends Phaser.Scene {
     // Level transition
     if (isPlayerOnExit(this.world, this.playerId)) {
       this.syncRunStateFromPlayer();
-      this.loadLevel(this.levelIndex + 1);
+      this.floorIndex++;
+      this.loadFloor(this.floorIndex);
       return;
     }
 
@@ -267,10 +277,10 @@ export class GameScene extends Phaser.Scene {
     this.emitUIUpdate();
   }
 
-  private loadLevel(level: number) {
+  private loadFloor(floor: number) {
-    this.levelIndex = level;
+    this.floorIndex = floor;
 
-    const { world, playerId } = makeTestWorld(level, this.runState);
+    const { world, playerId } = generateWorld(floor, this.runState);
     this.world = world;
     this.playerId = playerId;
 
@@ -281,8 +291,8 @@ export class GameScene extends Phaser.Scene {
     // Camera bounds for this level
     this.cameras.main.setBounds(0, 0, this.world.width * TILE_SIZE, this.world.height * TILE_SIZE);
 
-    // Initialize Renderer for new level
+    // Initialize Renderer for new floor
-    this.dungeonRenderer.initializeLevel(this.world);
+    this.dungeonRenderer.initializeFloor(this.world);
 
     // Step until player turn
     const enemyStep = stepUntilPlayerTurn(this.world, this.playerId);
@@ -292,7 +302,6 @@ export class GameScene extends Phaser.Scene {
     this.centerCameraOnPlayer();
     this.dungeonRenderer.render(this.playerPath);
     this.emitUIUpdate();
-
   }
 
   private syncRunStateFromPlayer() {
@@ -310,9 +319,11 @@ export class GameScene extends Phaser.Scene {
       stats: { ...GAME_CONFIG.player.initialStats },
       inventory: { gold: 0, items: [] }
     };
-    this.loadLevel(1);
+    this.floorIndex = 1;
+    this.loadFloor(this.floorIndex);
   }
 
+
   private centerCameraOnPlayer() {
     const player = this.world.actors.get(this.playerId)!;
     this.cameras.main.centerOn(

src/scenes/__tests__/GameScene.test.ts

@@ -61,7 +61,8 @@ vi.mock('phaser', () => {
 vi.mock('../../rendering/DungeonRenderer', () => ({
   DungeonRenderer: vi.fn().mockImplementation(function() {
     return {
-      initializeLevel: vi.fn(),
+      initializeFloor: vi.fn(),
+
       computeFov: vi.fn(),
       render: vi.fn(),
       showDamage: vi.fn(),
@@ -78,7 +79,8 @@ vi.mock('../../engine/simulation/simulation', () => ({
 }));
 
 vi.mock('../../engine/world/generator', () => ({
-  makeTestWorld: vi.fn(),
+  generateWorld: vi.fn(),
+
 }));
 
 vi.mock('../../engine/world/world-logic', () => ({
@@ -133,7 +135,8 @@ describe('GameScene', () => {
     };
     mockWorld.actors.set(1, mockPlayer);
 
-    (generator.makeTestWorld as any).mockReturnValue({
+    (generator.generateWorld as any).mockReturnValue({
+
       world: mockWorld,
       playerId: 1,
     });
@@ -170,7 +173,8 @@ describe('GameScene', () => {
     
     // Verify it was called with some stats
     const callArgs = mockUI.showDeathScreen.mock.calls[0][0];
-    expect(callArgs).toHaveProperty('level');
+    expect(callArgs).toHaveProperty('floor');
+
     expect(callArgs).toHaveProperty('gold');
     expect(callArgs).toHaveProperty('stats');
   });

src/ui/GameUI.ts

@@ -1,11 +1,13 @@
 import Phaser from "phaser";
-import { type World, type EntityId } from "../core/types";
+import { type World, type EntityId, type Stats } from "../core/types";
 import { GAME_CONFIG } from "../core/config/GameConfig";
 
 export default class GameUI extends Phaser.Scene {
   // HUD
-  private levelText!: Phaser.GameObjects.Text;
+  private floorText!: Phaser.GameObjects.Text;
   private healthBar!: Phaser.GameObjects.Graphics;
+  private expBar!: Phaser.GameObjects.Graphics;
+
 
   // Menu
   private menuOpen = false;
@@ -31,8 +33,8 @@ export default class GameUI extends Phaser.Scene {
 
     // Listen for updates from GameScene
     const gameScene = this.scene.get("GameScene");
-    gameScene.events.on("update-ui", (data: { world: World; playerId: EntityId; levelIndex: number }) => {
+    gameScene.events.on("update-ui", (data: { world: World; playerId: EntityId; floorIndex: number }) => {
-      this.updateUI(data.world, data.playerId, data.levelIndex);
+      this.updateUI(data.world, data.playerId, data.floorIndex);
     });
 
     gameScene.events.on("toggle-menu", () => this.toggleMenu());
@@ -40,13 +42,14 @@ export default class GameUI extends Phaser.Scene {
   }
 
   private createHud() {
-    this.levelText = this.add.text(10, 10, "Level 1", {
+    this.floorText = this.add.text(10, 10, "Floor 1", {
         fontSize: "20px",
         color: "#ffffff",
         fontStyle: "bold"
     }).setDepth(100);
 
     this.healthBar = this.add.graphics().setDepth(100);
+    this.expBar = this.add.graphics().setDepth(100);
   }
 
   private createMenu() {
@@ -163,11 +166,13 @@ export default class GameUI extends Phaser.Scene {
     this.deathContainer.setVisible(false);
   }
 
-  showDeathScreen(data: { level: number; gold: number; stats: any }) {
+  showDeathScreen(data: { floor: number; gold: number; stats: Stats }) {
     const lines = [
-      `Dungeon Level: ${data.level}`,
+      `Dungeon Floor: ${data.floor}`,
       `Gold Collected: ${data.gold}`,
+
       "",
+      `Experience gained: ${data.stats.exp}`,
       `Final HP: 0 / ${data.stats.maxHp}`,
       `Attack: ${data.stats.attack}`,
       `Defense: ${data.stats.defense}`
@@ -211,28 +216,40 @@ export default class GameUI extends Phaser.Scene {
     gameScene.events.emit("toggle-minimap");
   }
 
-  private updateUI(world: World, playerId: EntityId, levelIndex: number) {
+  private updateUI(world: World, playerId: EntityId, floorIndex: number) {
-    this.updateHud(world, playerId, levelIndex);
+    this.updateHud(world, playerId, floorIndex);
     if (this.menuOpen) {
-      this.updateMenuText(world, playerId, levelIndex);
+      this.updateMenuText(world, playerId, floorIndex);
     }
   }
 
-  private updateHud(world: World, playerId: EntityId, levelIndex: number) {
+  private updateHud(world: World, playerId: EntityId, floorIndex: number) {
-    this.levelText.setText(`Level ${levelIndex}`);
+    this.floorText.setText(`Floor ${floorIndex}`);
+
 
     const p = world.actors.get(playerId);
     if (!p || !p.stats) return;
 
-    const barX = 10;
+    const barX = 40;
     const barY = 40;
-    const barW = 200;
+    const barW = 180;
     const barH = 16;
     
     this.healthBar.clear();
+    
+    // Heart Icon
+    const iconX = 20;
+    const iconY = barY + barH / 2;
+    this.healthBar.fillStyle(0xff0000, 1);
+    // Draw simple heart
+    this.healthBar.fillCircle(iconX - 4, iconY - 2, 5);
+    this.healthBar.fillCircle(iconX + 4, iconY - 2, 5);
+    this.healthBar.fillTriangle(iconX - 9, iconY - 1, iconX + 9, iconY - 1, iconX, iconY + 9);
+
     this.healthBar.fillStyle(0x444444, 1);
     this.healthBar.fillRect(barX, barY, barW, barH);
 
+
     const hp = Math.max(0, p.stats.hp);
     const maxHp = Math.max(1, p.stats.maxHp);
     const pct = Phaser.Math.Clamp(hp / maxHp, 0, 1);
@@ -243,21 +260,54 @@ export default class GameUI extends Phaser.Scene {
     
     this.healthBar.lineStyle(2, 0xffffff, 1);
     this.healthBar.strokeRect(barX, barY, barW, barH);
+
+    // EXP Bar
+    const expY = barY + barH + 6;
+    const expH = 10;
+    this.expBar.clear();
+
+    // EXP Icon (Star/Orb)
+    const expIconY = expY + expH / 2;
+    this.expBar.fillStyle(GAME_CONFIG.rendering.expOrbColor, 1);
+    this.expBar.fillCircle(iconX, expIconY, 6);
+    this.expBar.fillStyle(0xffffff, 0.5);
+    this.expBar.fillCircle(iconX - 2, expIconY - 2, 2);
+
+    this.expBar.fillStyle(0x444444, 1);
+    this.expBar.fillRect(barX, expY, barW, expH);
+
+    const exp = p.stats.exp;
+    const nextExp = Math.max(1, p.stats.expToNextLevel);
+
+    const expPct = Phaser.Math.Clamp(exp / nextExp, 0, 1);
+    const expFillW = Math.floor(barW * expPct);
+
+    this.expBar.fillStyle(GAME_CONFIG.rendering.expOrbColor, 1);
+    this.expBar.fillRect(barX, expY, expFillW, expH);
+    
+    this.expBar.lineStyle(1, 0xffffff, 0.8);
+    this.expBar.strokeRect(barX, expY, barW, expH);
+
   }
 
-  private updateMenuText(world: World, playerId: EntityId, levelIndex: number) {
+
+  private updateMenuText(world: World, playerId: EntityId, _floorIndex: number) {
+
+
     const p = world.actors.get(playerId);
     const stats = p?.stats;
     const inv = p?.inventory;
 
     const lines: string[] = [];
-    lines.push(`Level ${levelIndex}`);
+    lines.push(`Level ${stats?.level ?? 1}`);
     lines.push("");
     lines.push("Stats");
     lines.push(`  HP: ${stats?.hp ?? 0}/${stats?.maxHp ?? 0}`);
+    lines.push(`  EXP: ${stats?.exp ?? 0}/${stats?.expToNextLevel ?? 0}`);
     lines.push(`  Attack: ${stats?.attack ?? 0}`);
     lines.push(`  Defense: ${stats?.defense ?? 0}`);
     lines.push(`  Speed: ${p?.speed ?? 0}`);
+
     lines.push("");
     lines.push("Inventory");
     lines.push(`  Gold: ${inv?.gold ?? 0}`);