===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,197 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var SoilPatch = Container.expand(function () {
+	var self = Container.call(this);
+	var soilGraphics = self.attachAsset('soil', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.state = 'empty'; // 'empty', 'planted', 'growing', 'mature'
+	self.growthTimer = 0;
+	self.seedGraphics = null;
+	self.cropGraphics = null;
+	self.plant = function () {
+		if (self.state === 'empty') {
+			self.state = 'planted';
+			self.seedGraphics = self.attachAsset('seed', {
+				anchorX: 0.5,
+				anchorY: 0.5
+			});
+			self.growthTimer = 0;
+			LK.getSound('plant').play();
+			return true;
+		}
+		return false;
+	};
+	self.harvest = function () {
+		if (self.state === 'mature') {
+			self.state = 'empty';
+			if (self.cropGraphics) {
+				self.cropGraphics.destroy();
+				self.cropGraphics = null;
+			}
+			LK.getSound('harvest').play();
+			return true;
+		}
+		return false;
+	};
+	self.update = function () {
+		if (self.state === 'planted') {
+			self.growthTimer++;
+			if (self.growthTimer >= 180) {
+				// 3 seconds at 60fps
+				self.state = 'growing';
+				if (self.seedGraphics) {
+					self.seedGraphics.destroy();
+					self.seedGraphics = null;
+				}
+				self.cropGraphics = self.attachAsset('crop', {
+					anchorX: 0.5,
+					anchorY: 0.5
+				});
+			}
+		} else if (self.state === 'growing') {
+			self.growthTimer++;
+			if (self.growthTimer >= 360) {
+				// 6 seconds total
+				self.state = 'mature';
+				if (self.cropGraphics) {
+					self.cropGraphics.destroy();
+					self.cropGraphics = null;
+				}
+				self.cropGraphics = self.attachAsset('matureCrop', {
+					anchorX: 0.5,
+					anchorY: 0.5
+				});
+			}
+		}
+	};
+	return self;
+});
+var Tractor = Container.expand(function () {
+	var self = Container.call(this);
+	var tractorGraphics = self.attachAsset('tractor', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.targetX = 0;
+	self.targetY = 0;
+	self.isMoving = false;
+	self.moveToTarget = function () {
+		if (self.isMoving) {
+			var dx = self.targetX - self.x;
+			var dy = self.targetY - self.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			if (distance > 5) {
+				self.x += dx / distance * self.speed;
+				self.y += dy / distance * self.speed;
+				// Rotate tractor to face movement direction
+				tractorGraphics.rotation = Math.atan2(dy, dx) + Math.PI / 2;
+			} else {
+				self.isMoving = false;
+			}
+		}
+	};
+	self.update = function () {
+		self.moveToTarget();
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
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+	backgroundColor: 0x4CAF50
+});
+
+/**** 
+* Game Code
+****/ 
+game.setBackgroundColor(0x8BC34A);
+var scoreTxt = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var tractor = game.addChild(new Tractor());
+tractor.x = 1024;
+tractor.y = 1366;
+var soilPatches = [];
+var farmWidth = 8;
+var farmHeight = 12;
+var patchSize = 80;
+var startX = 1024 - farmWidth * patchSize / 2;
+var startY = 400;
+// Create farm field
+for (var row = 0; row < farmHeight; row++) {
+	soilPatches[row] = [];
+	for (var col = 0; col < farmWidth; col++) {
+		var patch = new SoilPatch();
+		patch.x = startX + col * patchSize;
+		patch.y = startY + row * patchSize;
+		soilPatches[row][col] = patch;
+		game.addChild(patch);
+	}
+}
+var dragNode = null;
+var score = 0;
+function updateScore() {
+	scoreTxt.setText('Score: ' + score);
+}
+function checkTractorCollisions() {
+	for (var row = 0; row < farmHeight; row++) {
+		for (var col = 0; col < farmWidth; col++) {
+			var patch = soilPatches[row][col];
+			if (tractor.intersects(patch)) {
+				if (patch.state === 'empty') {
+					if (patch.plant()) {
+						score += 10;
+						updateScore();
+					}
+				} else if (patch.state === 'mature') {
+					if (patch.harvest()) {
+						score += 25;
+						updateScore();
+					}
+				}
+			}
+		}
+	}
+}
+game.down = function (x, y, obj) {
+	tractor.targetX = x;
+	tractor.targetY = y;
+	tractor.isMoving = true;
+	dragNode = tractor;
+};
+game.move = function (x, y, obj) {
+	if (dragNode) {
+		tractor.targetX = x;
+		tractor.targetY = y;
+		tractor.isMoving = true;
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+game.update = function () {
+	checkTractorCollisions();
+	// Keep tractor within game bounds
+	if (tractor.x < 50) tractor.x = 50;
+	if (tractor.x > 1998) tractor.x = 1998;
+	if (tractor.y < 50) tractor.y = 50;
+	if (tractor.y > 2682) tractor.y = 2682;
+	// Check win condition
+	if (score >= 500) {
+		LK.showYouWin();
+	}
+};
\ No newline at end of file