feat: Add player entity with WASD/space controls and spawn functionality

js/input.js

@@ -4,6 +4,42 @@ let isDragging = false;
 let lastMouseX, lastMouseY;
 let currentMouseX, currentMouseY;
 
+// Keyboard state tracking
+const keyState = {};
+let player = null;
+
+// Handle keyboard input for player movement
+window.addEventListener('keydown', (e) => {
+    keyState[e.code] = true;
+    
+    // Prevent default behavior for game control keys
+    if (['KeyW', 'KeyA', 'KeyS', 'KeyD', 'Space'].includes(e.code)) {
+        e.preventDefault();
+    }
+});
+
+window.addEventListener('keyup', (e) => {
+    keyState[e.code] = false;
+});
+
+function updatePlayerMovement() {
+    if (!player) return;
+    
+    // Reset movement flag
+    player.stopMoving();
+    
+    // Handle movement
+    if (keyState['KeyA']) {
+        player.moveLeft();
+    }
+    if (keyState['KeyD']) {
+        player.moveRight();
+    }
+    if (keyState['KeyW'] || keyState['Space']) {
+        player.jump();
+    }
+}
+
 function setTool(tool) {
     currentTool = tool;
     document.querySelectorAll('.tools button').forEach(btn => btn.classList.remove('active'));