diff --git a/src/game/__tests__/generator.test.ts b/src/game/__tests__/generator.test.ts
new file mode 100644
index 0000000..7317b14
--- /dev/null
+++ b/src/game/__tests__/generator.test.ts
@@ -0,0 +1,136 @@
+import { describe, it, expect } from 'vitest';
+import { generateWorld } from '../generator';
+import { isWall, inBounds } from '../world';
+
+describe('World Generator', () => {
+  describe('generateWorld', () => {
+    it('should generate a world with correct dimensions', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world } = generateWorld(1, runState);
+      
+      expect(world.width).toBe(60);
+      expect(world.height).toBe(40);
+      expect(world.tiles.length).toBe(60 * 40);
+    });
+
+    it('should place player actor', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world, playerId } = generateWorld(1, runState);
+      
+      expect(playerId).toBe(1);
+      const player = world.actors.get(playerId);
+      expect(player).toBeDefined();
+      expect(player?.isPlayer).toBe(true);
+      expect(player?.stats).toEqual(runState.stats);
+    });
+
+    it('should create walkable rooms', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world, playerId } = generateWorld(1, runState);
+      const player = world.actors.get(playerId)!;
+      
+      // Player should spawn in a walkable area
+      expect(isWall(world, player.pos.x, player.pos.y)).toBe(false);
+    });
+
+    it('should place exit in valid location', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world } = generateWorld(1, runState);
+      
+      expect(inBounds(world, world.exit.x, world.exit.y)).toBe(true);
+      // Exit should be on a floor tile
+      expect(isWall(world, world.exit.x, world.exit.y)).toBe(false);
+    });
+
+    it('should create enemies', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world, playerId } = generateWorld(1, runState);
+      
+      // Should have player + enemies
+      expect(world.actors.size).toBeGreaterThan(1);
+      
+      // All non-player actors should be enemies
+      const enemies = Array.from(world.actors.values()).filter(a => !a.isPlayer);
+      expect(enemies.length).toBeGreaterThan(0);
+      
+      // Enemies should have stats
+      enemies.forEach(enemy => {
+        expect(enemy.stats).toBeDefined();
+        expect(enemy.stats!.hp).toBeGreaterThan(0);
+        expect(enemy.stats!.attack).toBeGreaterThan(0);
+      });
+    });
+
+    it('should generate deterministic maps for same level', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world: world1, playerId: player1 } = generateWorld(1, runState);
+      const { world: world2, playerId: player2 } = generateWorld(1, runState);
+      
+      // Same level should generate identical layouts
+      expect(world1.tiles).toEqual(world2.tiles);
+      expect(world1.exit).toEqual(world2.exit);
+      
+      const player1Pos = world1.actors.get(player1)!.pos;
+      const player2Pos = world2.actors.get(player2)!.pos;
+      expect(player1Pos).toEqual(player2Pos);
+    });
+
+    it('should generate different maps for different levels', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world: world1 } = generateWorld(1, runState);
+      const { world: world2 } = generateWorld(2, runState);
+      
+      // Different levels should have different layouts
+      expect(world1.tiles).not.toEqual(world2.tiles);
+    });
+
+    it('should scale enemy difficulty with level', () => {
+      const runState = {
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+        inventory: { gold: 0, items: [] }
+      };
+      
+      const { world: world1 } = generateWorld(1, runState);
+      const { world: world5 } = generateWorld(5, runState);
+      
+      const enemies1 = Array.from(world1.actors.values()).filter(a => !a.isPlayer);
+      const enemies5 = Array.from(world5.actors.values()).filter(a => !a.isPlayer);
+      
+      // Higher level should have more enemies
+      expect(enemies5.length).toBeGreaterThan(enemies1.length);
+      
+      // Higher level enemies should have higher stats
+      const avgHp1 = enemies1.reduce((sum, e) => sum + (e.stats?.hp || 0), 0) / enemies1.length;
+      const avgHp5 = enemies5.reduce((sum, e) => sum + (e.stats?.hp || 0), 0) / enemies5.length;
+      expect(avgHp5).toBeGreaterThan(avgHp1);
+    });
+  });
+});
diff --git a/src/game/__tests__/simulation.test.ts b/src/game/__tests__/simulation.test.ts
new file mode 100644
index 0000000..d0b7691
--- /dev/null
+++ b/src/game/__tests__/simulation.test.ts
@@ -0,0 +1,125 @@
+import { describe, it, expect } from 'vitest';
+import { applyAction } from '../simulation';
+import { type World, type Actor, type EntityId } from '../types';
+
+describe('Combat Simulation', () => {
+  const createTestWorld = (actors: Map<EntityId, Actor>): World => ({
+    width: 10,
+    height: 10,
+    tiles: new Array(100).fill(0),
+    actors,
+    exit: { x: 9, y: 9 }
+  });
+
+  describe('applyAction - attack', () => {
+    it('should deal damage when player attacks enemy', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 1 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      const enemy = world.actors.get(2)!;
+      expect(enemy.hp).toBeLessThan(10);
+      
+      // Should have attack event
+      expect(events.some(e => e.type === 'attacked')).toBe(true);
+    });
+
+    it('should kill enemy when damage exceeds hp', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 50, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 1 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      // Enemy should be removed from world
+      expect(world.actors.has(2)).toBe(false);
+      
+      // Should have killed event
+      expect(events.some(e => e.type === 'killed')).toBe(true);
+    });
+
+    it('should apply defense to reduce damage', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+      actors.set(2, {
+        id: 2,
+        isPlayer: false,
+        pos: { x: 4, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 10, hp: 10, attack: 3, defense: 3 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'attack', targetId: 2 });
+
+      const enemy = world.actors.get(2)!;
+      const damage = 10 - enemy.stats!. hp;
+      
+      // Damage should be reduced by defense (5 attack - 3 defense = 2 damage)
+      expect(damage).toBe(2);
+    });
+  });
+
+  describe('applyAction - move', () => {
+    it('should move actor to new position', () => {
+      const actors = new Map<EntityId, Actor>();
+      actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0,
+        stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 }
+      });
+
+      const world = createTestWorld(actors);
+      const events = applyAction(world, 1, { type: 'move', dx: 1, dy: 0 });
+
+      const player = world.actors.get(1)!;
+      expect(player.pos).toEqual({ x: 4, y: 3 });
+      
+      // Should have moved event
+      expect(events.some(e => e.type === 'moved')).toBe(true);
+    });
+  });
+});
diff --git a/src/game/__tests__/world.test.ts b/src/game/__tests__/world.test.ts
new file mode 100644
index 0000000..c37c302
--- /dev/null
+++ b/src/game/__tests__/world.test.ts
@@ -0,0 +1,110 @@
+import { describe, it, expect } from 'vitest';
+import { idx, inBounds, isWall, isBlocked } from '../world';
+import { type World, type Tile } from '../types';
+
+describe('World Utilities', () => {
+  const createTestWorld = (width: number, height: number, tiles: Tile[]): World => ({
+    width,
+    height,
+    tiles,
+    actors: new Map(),
+    exit: { x: 0, y: 0 }
+  });
+
+  describe('idx', () => {
+    it('should calculate correct index for 2D coordinates', () => {
+      const world = createTestWorld(10, 10, []);
+      
+      expect(idx(world, 0, 0)).toBe(0);
+      expect(idx(world, 5, 0)).toBe(5);
+      expect(idx(world, 0, 1)).toBe(10);
+      expect(idx(world, 5, 3)).toBe(35);
+    });
+  });
+
+  describe('inBounds', () => {
+    it('should return true for coordinates within bounds', () => {
+      const world = createTestWorld(10, 10, []);
+      
+      expect(inBounds(world, 0, 0)).toBe(true);
+      expect(inBounds(world, 5, 5)).toBe(true);
+      expect(inBounds(world, 9, 9)).toBe(true);
+    });
+
+    it('should return false for coordinates outside bounds', () => {
+      const world = createTestWorld(10, 10, []);
+      
+      expect(inBounds(world, -1, 0)).toBe(false);
+      expect(inBounds(world, 0, -1)).toBe(false);
+      expect(inBounds(world, 10, 0)).toBe(false);
+      expect(inBounds(world, 0, 10)).toBe(false);
+      expect(inBounds(world, 11, 11)).toBe(false);
+    });
+  });
+
+  describe('isWall', () => {
+    it('should return true for wall tiles', () => {
+      const tiles: Tile[] = new Array(100).fill(0);
+      tiles[0] = 1; // wall at 0,0
+      tiles[55] = 1; // wall at 5,5
+      
+      const world = createTestWorld(10, 10, tiles);
+      
+      expect(isWall(world, 0, 0)).toBe(true);
+      expect(isWall(world, 5, 5)).toBe(true);
+    });
+
+    it('should return false for floor tiles', () => {
+      const tiles: Tile[] = new Array(100).fill(0);
+      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', () => {
+      const world = createTestWorld(10, 10, new Array(100).fill(0));
+      
+      expect(isWall(world, -1, 0)).toBe(false);
+      expect(isWall(world, 10, 10)).toBe(false);
+    });
+  });
+
+  describe('isBlocked', () => {
+    it('should return true for walls', () => {
+      const tiles: Tile[] = new Array(100).fill(0);
+      tiles[55] = 1; // wall at 5,5
+      
+      const world = createTestWorld(10, 10, tiles);
+      
+      expect(isBlocked(world, 5, 5)).toBe(true);
+    });
+
+    it('should return true for actor positions', () => {
+      const world = createTestWorld(10, 10, new Array(100).fill(0));
+      world.actors.set(1, {
+        id: 1,
+        isPlayer: true,
+        pos: { x: 3, y: 3 },
+        speed: 100,
+        energy: 0
+      });
+      
+      expect(isBlocked(world, 3, 3)).toBe(true);
+    });
+
+    it('should return false for empty floor tiles', () => {
+      const world = createTestWorld(10, 10, new Array(100).fill(0));
+      
+      expect(isBlocked(world, 3, 3)).toBe(false);
+      expect(isBlocked(world, 7, 7)).toBe(false);
+    });
+
+    it('should return true for out of bounds', () => {
+      const world = createTestWorld(10, 10, new Array(100).fill(0));
+      
+      expect(isBlocked(world, -1, 0)).toBe(true);
+      expect(isBlocked(world, 10, 10)).toBe(true);
+    });
+  });
+});
diff --git a/src/game/config/GameConfig.ts b/src/game/config/GameConfig.ts
new file mode 100644
index 0000000..700f41f
--- /dev/null
+++ b/src/game/config/GameConfig.ts
@@ -0,0 +1,62 @@
+export const GAME_CONFIG = {
+  player: {
+    initialStats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+    speed: 100,
+    viewRadius: 8
+  },
+  
+  map: {
+    width: 60,
+    height: 40,
+    minRooms: 8,
+    maxRooms: 13,
+    roomMinWidth: 5,
+    roomMaxWidth: 12,
+    roomMinHeight: 4,
+    roomMaxHeight: 10
+  },
+  
+  enemy: {
+    baseHpPerLevel: 2,
+    baseHp: 8,
+    baseAttack: 3,
+    attackPerTwoLevels: 1,
+    minSpeed: 80,
+    maxSpeed: 130,
+    maxDefense: 2,
+    baseCountPerLevel: 1,
+    baseCount: 3,
+    randomBonus: 4
+  },
+  
+  rendering: {
+    tileSize: 24,
+    cameraZoom: 2,
+    wallColor: 0x2b2b2b,
+    floorColor: 0x161616,
+    exitColor: 0xffd166,
+    playerColor: 0x66ff66,
+    enemyColor: 0xff6666,
+    pathPreviewColor: 0x3355ff,
+    fogAlphaFloor: 0.15,
+    fogAlphaWall: 0.35,
+    visibleMinAlpha: 0.35,
+    visibleMaxAlpha: 1.0,
+    visibleStrengthFactor: 0.65
+  },
+  
+  ui: {
+    minimapPanelWidth: 340,
+    minimapPanelHeight: 220,
+    minimapPadding: 20,
+    menuPanelWidth: 340,
+    menuPanelHeight: 220
+  },
+  
+  gameplay: {
+    energyThreshold: 100,
+    actionCost: 100
+  }
+} as const;
+
+export type GameConfig = typeof GAME_CONFIG;
diff --git a/src/game/generator.ts b/src/game/generator.ts
index 25f040e..edd35a7 100644
--- a/src/game/generator.ts
+++ b/src/game/generator.ts
@@ -1,5 +1,6 @@
 import { type World, type EntityId, type RunState, type Tile, type Actor, type Vec2 } from "./types";
 import { idx } from "./world";
+import { GAME_CONFIG } from "./config/GameConfig";
 
 interface Room {
   x: number;
@@ -16,9 +17,15 @@ function seededRandom(seed: number): () => number {
   };
 }
 
-export function makeTestWorld(level: number, runState: RunState): { world: World; playerId: EntityId } {
-  const width = 60;
-  const height = 40;
+/**
+ * Generates a procedural dungeon world with rooms and corridors
+ * @param level The level number (affects difficulty and randomness seed)
+ * @param runState Player's persistent state across levels
+ * @returns Generated world and player ID
+ */
+export function generateWorld(level: 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(1); // Start with all walls
 
   const fakeWorldForIdx: World = { width, height, tiles, actors: new Map(), exit: { x: 0, y: 0 } };
@@ -26,11 +33,11 @@ export function makeTestWorld(level: number, runState: RunState): { world: World
   
   // Generate rooms
   const rooms: Room[] = [];
-  const numRooms = 8 + Math.floor(random() * 6); // 8-13 rooms
+  const numRooms = GAME_CONFIG.map.minRooms + Math.floor(random() * (GAME_CONFIG.map.maxRooms - GAME_CONFIG.map.minRooms + 1));
   
   for (let i = 0; i < numRooms; i++) {
-    const roomWidth = 5 + Math.floor(random() * 8); // 5-12
-    const roomHeight = 4 + Math.floor(random() * 7); // 4-10
+    const roomWidth = GAME_CONFIG.map.roomMinWidth + Math.floor(random() * (GAME_CONFIG.map.roomMaxWidth - GAME_CONFIG.map.roomMinWidth + 1));
+    const roomHeight = GAME_CONFIG.map.roomMinHeight + Math.floor(random() * (GAME_CONFIG.map.roomMaxHeight - GAME_CONFIG.map.roomMinHeight + 1));
     const roomX = 1 + Math.floor(random() * (width - roomWidth - 2));
     const roomY = 1 + Math.floor(random() * (height - roomHeight - 2));
     
@@ -108,7 +115,7 @@ export function makeTestWorld(level: number, runState: RunState): { world: World
     id: playerId,
     isPlayer: true,
     pos: { x: playerX, y: playerY },
-    speed: 100,
+    speed: GAME_CONFIG.player.speed,
     energy: 0,
     stats: { ...runState.stats },
     inventory: { gold: runState.inventory.gold, items: [...runState.inventory.items] }
@@ -116,7 +123,7 @@ export function makeTestWorld(level: number, runState: RunState): { world: World
 
   // Place enemies in random rooms (skip first room with player)
   let enemyId = 2;
-  const numEnemies = 3 + level + Math.floor(random() * 4); // Increases with level
+  const numEnemies = GAME_CONFIG.enemy.baseCount + level * GAME_CONFIG.enemy.baseCountPerLevel + Math.floor(random() * GAME_CONFIG.enemy.randomBonus);
   
   for (let i = 0; i < numEnemies && i < rooms.length - 1; i++) {
     const roomIdx = 1 + Math.floor(random() * (rooms.length - 1));
@@ -126,20 +133,20 @@ export function makeTestWorld(level: number, runState: RunState): { world: World
     const enemyY = room.y + 1 + Math.floor(random() * (room.height - 2));
     
     // Vary enemy stats by level
-    const baseHp = 8 + level * 2;
-    const baseAttack = 3 + Math.floor(level / 2);
+    const baseHp = GAME_CONFIG.enemy.baseHp + level * GAME_CONFIG.enemy.baseHpPerLevel;
+    const baseAttack = GAME_CONFIG.enemy.baseAttack + Math.floor(level / 2) * GAME_CONFIG.enemy.attackPerTwoLevels;
     
     actors.set(enemyId, {
       id: enemyId,
       isPlayer: false,
       pos: { x: enemyX, y: enemyY },
-      speed: 80 + Math.floor(random() * 50), // 80-130 speed
+      speed: GAME_CONFIG.enemy.minSpeed + Math.floor(random() * (GAME_CONFIG.enemy.maxSpeed - GAME_CONFIG.enemy.minSpeed)),
       energy: 0,
       stats: {
         maxHp: baseHp + Math.floor(random() * 4),
         hp: baseHp + Math.floor(random() * 4),
         attack: baseAttack + Math.floor(random() * 2),
-        defense: Math.floor(random() * 3)
+        defense: Math.floor(random() * (GAME_CONFIG.enemy.maxDefense + 1))
       }
     });
     enemyId++;
@@ -147,3 +154,8 @@ export function makeTestWorld(level: number, runState: RunState): { world: World
 
   return { world: { width, height, tiles, actors, exit }, playerId };
 }
+
+// Backward compatibility - will be removed in Phase 2
+/** @deprecated Use generateWorld instead */
+export const makeTestWorld = generateWorld;
+
diff --git a/src/game/types.ts b/src/game/types.ts
index baad038..2322dd5 100644
--- a/src/game/types.ts
+++ b/src/game/types.ts
@@ -53,6 +53,10 @@ export type World = {
   exit: Vec2;
 };
 
-export const TILE_SIZE = 24;
-export const ENERGY_THRESHOLD = 100;
-export const ACTION_COST = 100;
+// Import constants from config
+import { GAME_CONFIG } from "./config/GameConfig";
+
+export const TILE_SIZE = GAME_CONFIG.rendering.tileSize;
+export const ENERGY_THRESHOLD = GAME_CONFIG.gameplay.energyThreshold;
+export const ACTION_COST = GAME_CONFIG.gameplay.actionCost;
+
diff --git a/src/scenes/DungeonRenderer.ts b/src/scenes/DungeonRenderer.ts
index a9bf8ad..5ded101 100644
--- a/src/scenes/DungeonRenderer.ts
+++ b/src/scenes/DungeonRenderer.ts
@@ -2,6 +2,7 @@ import Phaser from "phaser";
 import { FOV } from "rot-js";
 import { type World, type EntityId, type Vec2, TILE_SIZE } from "../game/types";
 import { idx, inBounds, isWall } from "../game/world";
+import { GAME_CONFIG } from "../game/config/GameConfig";
 
 export class DungeonRenderer {
   private scene: Phaser.Scene;
@@ -12,7 +13,6 @@ export class DungeonRenderer {
   private seen!: Uint8Array;
   private visible!: Uint8Array;
   private visibleStrength!: Float32Array;
-  private viewRadius = 8;
   
   // State refs
   private world!: World;
@@ -21,8 +21,6 @@ export class DungeonRenderer {
   private minimapGfx!: Phaser.GameObjects.Graphics;
   private minimapContainer!: Phaser.GameObjects.Container;
   private minimapBg!: Phaser.GameObjects.Rectangle;
-  private minimapPanelWidth = 340; // Match menu size
-  private minimapPanelHeight = 220; // Match menu size
   private minimapVisible = false; // Off by default
 
   constructor(scene: Phaser.Scene) {
@@ -40,7 +38,7 @@ export class DungeonRenderer {
     
     // Background panel (like menu)
     this.minimapBg = this.scene.add
-      .rectangle(0, 0, this.minimapPanelWidth, this.minimapPanelHeight, 0x000000, 0.8)
+      .rectangle(0, 0, GAME_CONFIG.ui.minimapPanelWidth, GAME_CONFIG.ui.minimapPanelHeight, 0x000000, 0.8)
       .setStrokeStyle(1, 0xffffff, 0.9)
       .setInteractive(); // Capture clicks
     
@@ -94,7 +92,7 @@ export class DungeonRenderer {
     const ox = player.pos.x;
     const oy = player.pos.y;
 
-    this.fov.compute(ox, oy, this.viewRadius, (x: number, y: number, r: number, v: number) => {
+    this.fov.compute(ox, oy, GAME_CONFIG.player.viewRadius, (x: number, y: number, r: number, v: number) => {
       if (!inBounds(this.world, x, y)) return;
 
       const i = idx(this.world, x, y);
@@ -102,7 +100,7 @@ export class DungeonRenderer {
       this.seen[i] = 1;
 
       // falloff: 1 at center, ~0.4 at radius edge
-      const radiusT = Phaser.Math.Clamp(r / this.viewRadius, 0, 1);
+      const radiusT = Phaser.Math.Clamp(r / GAME_CONFIG.player.viewRadius, 0, 1);
       const falloff = 1 - radiusT * 0.6;
       const strength = Phaser.Math.Clamp(v * falloff, 0, 1);
 
@@ -139,14 +137,14 @@ export class DungeonRenderer {
         }
 
         const wall = isWall(this.world, x, y);
-        const base = wall ? 0x2b2b2b : 0x161616;
+        const base = wall ? GAME_CONFIG.rendering.wallColor : GAME_CONFIG.rendering.floorColor;
 
         let alpha: number;
         if (isVis) {
           const s = this.visibleStrength[i];
-          alpha = Phaser.Math.Clamp(0.35 + s * 0.65, 0.35, 1.0);
+          alpha = Phaser.Math.Clamp(GAME_CONFIG.rendering.visibleMinAlpha + s * GAME_CONFIG.rendering.visibleStrengthFactor, GAME_CONFIG.rendering.visibleMinAlpha, GAME_CONFIG.rendering.visibleMaxAlpha);
         } else {
-          alpha = wall ? 0.35 : 0.15;
+          alpha = wall ? GAME_CONFIG.rendering.fogAlphaWall : GAME_CONFIG.rendering.fogAlphaFloor;
         }
 
         this.gfx.fillStyle(base, alpha);
@@ -160,15 +158,15 @@ export class DungeonRenderer {
       const ey = this.world.exit.y;
       const i = idx(this.world, ex, ey);
       if (this.seen[i] === 1) {
-        const alpha = this.visible[i] === 1 ? 1.0 : 0.35;
-        this.gfx.fillStyle(0xffd166, alpha);
+        const alpha = this.visible[i] === 1 ? 1.0 : GAME_CONFIG.rendering.visibleMinAlpha;
+        this.gfx.fillStyle(GAME_CONFIG.rendering.exitColor, alpha);
         this.gfx.fillRect(ex * TILE_SIZE + 7, ey * TILE_SIZE + 7, TILE_SIZE - 14, TILE_SIZE - 14);
       }
     }
 
     // Path preview (seen only)
     if (playerPath.length >= 2) {
-      this.gfx.fillStyle(0x3355ff, 0.35);
+      this.gfx.fillStyle(GAME_CONFIG.rendering.pathPreviewColor, GAME_CONFIG.rendering.visibleMinAlpha);
       for (const p of playerPath) {
         // We can check isSeen via internal helper or just local array since we're inside
         const i = idx(this.world, p.x, p.y);
@@ -183,7 +181,7 @@ export class DungeonRenderer {
       const isVis = this.visible[i] === 1;
       if (!a.isPlayer && !isVis) continue;
 
-      const color = a.isPlayer ? 0x66ff66 : 0xff6666;
+      const color = a.isPlayer ? GAME_CONFIG.rendering.playerColor : GAME_CONFIG.rendering.enemyColor;
       this.gfx.fillStyle(color, 1);
       this.gfx.fillRect(a.pos.x * TILE_SIZE + 4, a.pos.y * TILE_SIZE + 4, TILE_SIZE - 8, TILE_SIZE - 8);
     }
@@ -198,9 +196,9 @@ export class DungeonRenderer {
     if (!this.world) return;
 
     // Calculate scale to fit map within panel
-    const padding = 20;
-    const availableWidth = this.minimapPanelWidth - padding * 2;
-    const availableHeight = this.minimapPanelHeight - padding * 2;
+    const padding = GAME_CONFIG.ui.minimapPadding;
+    const availableWidth = GAME_CONFIG.ui.minimapPanelWidth - padding * 2;
+    const availableHeight = GAME_CONFIG.ui.minimapPanelHeight - padding * 2;
     
     const scaleX = availableWidth / this.world.width;
     const scaleY = availableHeight / this.world.height;
diff --git a/src/scenes/GameScene.ts b/src/scenes/GameScene.ts
index 2c659a5..a724fad 100644
--- a/src/scenes/GameScene.ts
+++ b/src/scenes/GameScene.ts
@@ -12,6 +12,7 @@ import { findPathAStar } from "../game/pathfinding";
 import { applyAction, stepUntilPlayerTurn } from "../game/simulation";
 import { makeTestWorld } from "../game/generator";
 import { DungeonRenderer } from "./DungeonRenderer";
+import { GAME_CONFIG } from "../game/config/GameConfig";
 
 export class GameScene extends Phaser.Scene {
   private world!: World;
@@ -20,7 +21,7 @@ export class GameScene extends Phaser.Scene {
   private levelIndex = 1;
 
   private runState: RunState = {
-    stats: { maxHp: 20, hp: 20, attack: 5, defense: 2 },
+    stats: { ...GAME_CONFIG.player.initialStats },
     inventory: { gold: 0, items: [] }
   };
 
@@ -41,7 +42,7 @@ export class GameScene extends Phaser.Scene {
     this.cursors = this.input.keyboard!.createCursorKeys();
 
     // Camera
-    this.cameras.main.setZoom(2);
+    this.cameras.main.setZoom(GAME_CONFIG.rendering.cameraZoom);
 
     // Initialize Sub-systems
     this.dungeonRenderer = new DungeonRenderer(this);
diff --git a/src/scenes/GameUI.ts b/src/scenes/GameUI.ts
index 4c09c8c..b4bfee6 100644
--- a/src/scenes/GameUI.ts
+++ b/src/scenes/GameUI.ts
@@ -1,5 +1,6 @@
 import Phaser from "phaser";
 import { type World, type EntityId } from "../game/types";
+import { GAME_CONFIG } from "../game/config/GameConfig";
 
 export default class GameUI extends Phaser.Scene {
   // HUD
@@ -84,8 +85,8 @@ export default class GameUI extends Phaser.Scene {
     mapBtnBg.setInteractive({ useHandCursor: true }).on("pointerdown", () => this.toggleMap());
 
     // Panel (center)
-    const panelW = 340;
-    const panelH = 220;
+    const panelW = GAME_CONFIG.ui.menuPanelWidth;
+    const panelH = GAME_CONFIG.ui.menuPanelHeight;
 
     this.menuBg = this.add
       .rectangle(0, 0, panelW, panelH, 0x000000, 0.8)