feat: initialize project with core dependencies and game entry point

src/Game.js

@@ -0,0 +1,52 @@
+import { Graphics } from './Graphics.js';
+import { World } from './World.js';
+import { Player } from './Player.js';
+
+export class Game {
+    constructor() {
+        this.graphics = new Graphics();
+        this.world = new World(this.graphics.scene);
+        this.player = new Player(this.graphics.camera, this.world.colliders);
+
+        this.isRunning = false;
+        this.lastTime = 0;
+
+        this.setupUI();
+    }
+
+    setupUI() {
+        const startScreen = document.getElementById('start-screen');
+        const hud = document.getElementById('hud');
+
+        startScreen.addEventListener('click', () => {
+            this.player.lockControls();
+            startScreen.style.display = 'none';
+            hud.style.display = 'block';
+            this.isRunning = true;
+        });
+    }
+
+    start() {
+        this.graphics.init();
+        this.world.load();
+
+        // Add player to scene if needed, but usually player moves camera
+        this.graphics.scene.add(this.player.getObject());
+
+        requestAnimationFrame(this.loop.bind(this));
+    }
+
+    loop(time) {
+        requestAnimationFrame(this.loop.bind(this));
+
+        const dt = Math.min((time - this.lastTime) / 1000, 0.1); // Cap dt
+        this.lastTime = time;
+
+        if (this.isRunning) {
+            this.player.update(dt);
+            // this.world.update(dt);
+        }
+
+        this.graphics.render();
+    }
+}