===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,470 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Attack class (for both player and enemy)
+var Attack = Container.expand(function () {
+	var self = Container.call(this);
+	// type: 'basic', 'special', 'enemy'
+	self.type = 'basic';
+	self.owner = null; // player or enemy
+	self.dmg = 10;
+	self.speed = 30;
+	self.radius = 30;
+	self.dirY = -1; // -1 up, 1 down
+	// Attach asset
+	self.setType = function (type) {
+		self.type = type;
+		if (type === 'basic') {
+			self.removeChildren();
+			self.attachAsset('attack_basic', {
+				anchorX: 0.5,
+				anchorY: 0.5
+			});
+			self.dmg = 10;
+			self.speed = 36;
+			self.radius = 30;
+			self.dirY = -1;
+		} else if (type === 'special') {
+			self.removeChildren();
+			self.attachAsset('attack_special', {
+				anchorX: 0.5,
+				anchorY: 0.5
+			});
+			self.dmg = 22;
+			self.speed = 24;
+			self.radius = 40;
+			self.dirY = -1;
+		} else if (type === 'enemy') {
+			self.removeChildren();
+			self.attachAsset('attack_enemy', {
+				anchorX: 0.5,
+				anchorY: 0.5
+			});
+			self.dmg = 12;
+			self.speed = 28;
+			self.radius = 30;
+			self.dirY = 1;
+		}
+	};
+	// Update
+	self.update = function () {
+		self.y += self.speed * self.dirY;
+	};
+	return self;
+});
+// Enemy Pokemon class (AI)
+var EnemyPokemon = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach enemy asset
+	var sprite = self.attachAsset('poke_enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Stats
+	self.maxHP = 100;
+	self.hp = 100;
+	self.speed = 12; // px per move
+	self.radius = sprite.width / 2;
+	// For attack cooldowns
+	self.basicCooldown = 0;
+	self.specialCooldown = 0;
+	// For invulnerability after hit
+	self.invuln = 0;
+	// Move to (x, y) with bounds
+	self.moveTo = function (x, y) {
+		// Clamp to arena bounds (leave 20px margin)
+		var minX = 20 + self.radius;
+		var maxX = 2048 - 20 - self.radius;
+		var minY = 20 + self.radius;
+		var maxY = 1366 - 20 - self.radius; // top half
+		self.x = Math.max(minX, Math.min(maxX, x));
+		self.y = Math.max(minY, Math.min(maxY, y));
+	};
+	// Take damage
+	self.takeDamage = function (dmg) {
+		if (self.invuln > 0) return;
+		self.hp -= dmg;
+		if (self.hp < 0) self.hp = 0;
+		self.invuln = 30; // 0.5s invuln
+		LK.effects.flashObject(self, 0xffffff, 200);
+	};
+	return self;
+});
+// Player Pokemon class
+var PlayerPokemon = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach player asset
+	var sprite = self.attachAsset('poke_player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Stats
+	self.maxHP = 100;
+	self.hp = 100;
+	self.speed = 18; // px per move
+	self.radius = sprite.width / 2;
+	// For drag
+	self.isDragging = false;
+	// For attack cooldowns
+	self.basicCooldown = 0;
+	self.specialCooldown = 0;
+	// For invulnerability after hit
+	self.invuln = 0;
+	// Move to (x, y) with bounds
+	self.moveTo = function (x, y) {
+		// Clamp to arena bounds (leave 20px margin)
+		var minX = 20 + self.radius;
+		var maxX = 2048 - 20 - self.radius;
+		var minY = 1366 + 20 + self.radius; // bottom half
+		var maxY = 2732 - 20 - self.radius;
+		self.x = Math.max(minX, Math.min(maxX, x));
+		self.y = Math.max(minY, Math.min(maxY, y));
+	};
+	// Take damage
+	self.takeDamage = function (dmg) {
+		if (self.invuln > 0) return;
+		self.hp -= dmg;
+		if (self.hp < 0) self.hp = 0;
+		self.invuln = 30; // 0.5s invuln
+		LK.effects.flashObject(self, 0xffffff, 200);
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0xf5f5f5
+});
+
+/**** 
+* Game Code
+****/ 
+// Attack SFX
+// Pokemon shapes (simple for MVP)
+// Arena background
+var arenaBg = LK.getAsset('arena_bg', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: 0
+});
+game.addChild(arenaBg);
+// Player and enemy
+var player = new PlayerPokemon();
+var enemy = new EnemyPokemon();
+game.addChild(player);
+game.addChild(enemy);
+// Initial positions
+player.moveTo(2048 / 2, 2732 - 300);
+enemy.moveTo(2048 / 2, 300);
+// HP bars
+var playerHpBg = LK.getAsset('hp_bar_bg', {
+	anchorX: 0,
+	anchorY: 0.5,
+	x: 100,
+	y: 2732 - 100
+});
+var playerHpFg = LK.getAsset('hp_bar_fg', {
+	anchorX: 0,
+	anchorY: 0.5,
+	x: 100,
+	y: 2732 - 100
+});
+game.addChild(playerHpBg);
+game.addChild(playerHpFg);
+var enemyHpBg = LK.getAsset('hp_bar_bg', {
+	anchorX: 0,
+	anchorY: 0.5,
+	x: 100,
+	y: 100
+});
+var enemyHpFg = LK.getAsset('hp_bar_fg_enemy', {
+	anchorX: 0,
+	anchorY: 0.5,
+	x: 100,
+	y: 100
+});
+game.addChild(enemyHpBg);
+game.addChild(enemyHpFg);
+// HP text
+var playerHpTxt = new Text2('100/100', {
+	size: 60,
+	fill: "#222"
+});
+playerHpTxt.anchor.set(0, 0.5);
+playerHpTxt.x = 520;
+playerHpTxt.y = 2732 - 100;
+game.addChild(playerHpTxt);
+var enemyHpTxt = new Text2('100/100', {
+	size: 60,
+	fill: "#222"
+});
+enemyHpTxt.anchor.set(0, 0.5);
+enemyHpTxt.x = 520;
+enemyHpTxt.y = 100;
+game.addChild(enemyHpTxt);
+// Attack buttons (GUI)
+var atkBtn = new Text2('Attack', {
+	size: 90,
+	fill: "#fff"
+});
+atkBtn.anchor.set(0.5, 0.5);
+atkBtn.x = 2048 / 2 - 200;
+atkBtn.y = 2732 - 220;
+atkBtn.bg = LK.getAsset('hp_bar_bg', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: atkBtn.x,
+	y: atkBtn.y,
+	width: 260,
+	height: 120
+});
+game.addChild(atkBtn.bg);
+game.addChild(atkBtn);
+var spcBtn = new Text2('Special', {
+	size: 90,
+	fill: "#fff"
+});
+spcBtn.anchor.set(0.5, 0.5);
+spcBtn.x = 2048 / 2 + 200;
+spcBtn.y = 2732 - 220;
+spcBtn.bg = LK.getAsset('hp_bar_bg', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: spcBtn.x,
+	y: spcBtn.y,
+	width: 260,
+	height: 120
+});
+game.addChild(spcBtn.bg);
+game.addChild(spcBtn);
+// Attack cooldown overlays
+var atkBtnCd = LK.getAsset('hp_bar_fg', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: atkBtn.x,
+	y: atkBtn.y,
+	width: 260,
+	height: 120
+});
+atkBtnCd.alpha = 0.5;
+game.addChild(atkBtnCd);
+atkBtnCd.visible = false;
+var spcBtnCd = LK.getAsset('hp_bar_fg_enemy', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: spcBtn.x,
+	y: spcBtn.y,
+	width: 260,
+	height: 120
+});
+spcBtnCd.alpha = 0.5;
+game.addChild(spcBtnCd);
+spcBtnCd.visible = false;
+// Attacks array
+var attacks = [];
+var enemyAttacks = [];
+// Dragging
+var dragNode = null;
+// Touch/move handlers
+function handleMove(x, y, obj) {
+	// Drag player
+	if (dragNode === player) {
+		player.moveTo(x, y);
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// If on attack button
+	if (atkBtn.bg.containsPoint({
+		x: x,
+		y: y
+	})) {
+		// Fire basic attack if not on cooldown
+		if (player.basicCooldown <= 0) {
+			var atk = new Attack();
+			atk.setType('basic');
+			atk.owner = 'player';
+			atk.x = player.x;
+			atk.y = player.y - player.radius - 40;
+			attacks.push(atk);
+			game.addChild(atk);
+			player.basicCooldown = 30; // 0.5s
+			LK.getSound('atk_basic').play();
+		}
+		return;
+	}
+	if (spcBtn.bg.containsPoint({
+		x: x,
+		y: y
+	})) {
+		// Fire special attack if not on cooldown
+		if (player.specialCooldown <= 0) {
+			var atk = new Attack();
+			atk.setType('special');
+			atk.owner = 'player';
+			atk.x = player.x;
+			atk.y = player.y - player.radius - 40;
+			attacks.push(atk);
+			game.addChild(atk);
+			player.specialCooldown = 120; // 2s
+			LK.getSound('atk_special').play();
+		}
+		return;
+	}
+	// If on player, start drag
+	var local = player.toLocal({
+		x: x,
+		y: y
+	});
+	if (local.x * local.x + local.y * local.y <= player.radius * player.radius) {
+		dragNode = player;
+		handleMove(x, y, obj);
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Helper: collision between two circles
+function circlesCollide(a, b) {
+	var dx = a.x - b.x;
+	var dy = a.y - b.y;
+	var dist = Math.sqrt(dx * dx + dy * dy);
+	return dist < a.radius + b.radius - 10;
+}
+// AI logic
+function enemyAI() {
+	// Move towards player x
+	var dx = player.x - enemy.x;
+	if (Math.abs(dx) > 10) {
+		var dir = dx > 0 ? 1 : -1;
+		enemy.moveTo(enemy.x + dir * enemy.speed, enemy.y);
+	}
+	// Randomly fire attack
+	if (enemy.basicCooldown <= 0 && Math.random() < 0.04) {
+		var atk = new Attack();
+		atk.setType('enemy');
+		atk.owner = 'enemy';
+		atk.x = enemy.x;
+		atk.y = enemy.y + enemy.radius + 40;
+		enemyAttacks.push(atk);
+		game.addChild(atk);
+		enemy.basicCooldown = 36 + Math.floor(Math.random() * 24); // 0.6-1s
+		LK.getSound('atk_enemy').play();
+	}
+	// Special attack less often
+	if (enemy.specialCooldown <= 0 && Math.random() < 0.01) {
+		var atk = new Attack();
+		atk.setType('enemy');
+		atk.owner = 'enemy';
+		atk.dmg = 22;
+		atk.speed = 20;
+		atk.radius = 40;
+		atk.x = enemy.x;
+		atk.y = enemy.y + enemy.radius + 40;
+		enemyAttacks.push(atk);
+		game.addChild(atk);
+		enemy.specialCooldown = 120 + Math.floor(Math.random() * 60);
+		LK.getSound('atk_enemy').play();
+	}
+}
+// Main update
+game.update = function () {
+	// Cooldowns
+	if (player.basicCooldown > 0) player.basicCooldown--;
+	if (player.specialCooldown > 0) player.specialCooldown--;
+	if (player.invuln > 0) player.invuln--;
+	if (enemy.basicCooldown > 0) enemy.basicCooldown--;
+	if (enemy.specialCooldown > 0) enemy.specialCooldown--;
+	if (enemy.invuln > 0) enemy.invuln--;
+	// Update attack cooldown overlays
+	atkBtnCd.visible = player.basicCooldown > 0;
+	if (atkBtnCd.visible) {
+		atkBtnCd.width = 260 * (player.basicCooldown / 30);
+	}
+	spcBtnCd.visible = player.specialCooldown > 0;
+	if (spcBtnCd.visible) {
+		spcBtnCd.width = 260 * (player.specialCooldown / 120);
+	}
+	// Update attacks
+	for (var i = attacks.length - 1; i >= 0; i--) {
+		var atk = attacks[i];
+		atk.update();
+		// Remove if off screen
+		if (atk.y < -100) {
+			atk.destroy();
+			attacks.splice(i, 1);
+			continue;
+		}
+		// Hit enemy
+		if (circlesCollide(atk, enemy) && enemy.hp > 0) {
+			enemy.takeDamage(atk.dmg);
+			atk.destroy();
+			attacks.splice(i, 1);
+			continue;
+		}
+	}
+	for (var i = enemyAttacks.length - 1; i >= 0; i--) {
+		var atk = enemyAttacks[i];
+		atk.update();
+		// Remove if off screen
+		if (atk.y > 2732 + 100) {
+			atk.destroy();
+			enemyAttacks.splice(i, 1);
+			continue;
+		}
+		// Hit player
+		if (circlesCollide(atk, player) && player.hp > 0) {
+			player.takeDamage(atk.dmg);
+			atk.destroy();
+			enemyAttacks.splice(i, 1);
+			continue;
+		}
+	}
+	// Enemy AI
+	if (enemy.hp > 0) {
+		enemyAI();
+	}
+	// Update HP bars
+	playerHpFg.width = 400 * (player.hp / player.maxHP);
+	playerHpTxt.setText(player.hp + '/' + player.maxHP);
+	enemyHpFg.width = 400 * (enemy.hp / enemy.maxHP);
+	enemyHpTxt.setText(enemy.hp + '/' + enemy.maxHP);
+	// Win/lose
+	if (player.hp <= 0) {
+		LK.effects.flashScreen(0xe53935, 800);
+		LK.showGameOver();
+		return;
+	}
+	if (enemy.hp <= 0) {
+		LK.effects.flashScreen(0x4caf50, 800);
+		LK.setScore(1);
+		LK.showYouWin();
+		return;
+	}
+};
+// GUI: show player and enemy names
+var playerName = new Text2('You', {
+	size: 60,
+	fill: 0x3B4CCA
+});
+playerName.anchor.set(0, 1);
+playerName.x = 100;
+playerName.y = 2732 - 160;
+game.addChild(playerName);
+var enemyName = new Text2('Enemy', {
+	size: 60,
+	fill: 0xE53935
+});
+enemyName.anchor.set(0, 0);
+enemyName.x = 100;
+enemyName.y = 160;
+game.addChild(enemyName);
+// Center arena (no scrolling, so nothing to do)
\ No newline at end of file