===================================================================
--- original.js
+++ change.js
@@ -29,8 +29,24 @@
 		if (self.y > 2732 - ballGraphics.height / 2) {
 			self.y = 2732 - ballGraphics.height / 2;
 			self.vy = 0;
 		}
+		if (self.x > 2048 - ballGraphics.width / 2) {
+			self.x = 2048 - ballGraphics.width / 2;
+			self.vx = 0;
+		}
+		if (self.x < ballGraphics.width / 2) {
+			self.x = ballGraphics.width / 2;
+			self.vx = 0;
+		}
+		if (self.x > 2048 - ballGraphics.width / 2) {
+			self.x = 2048 - ballGraphics.width / 2;
+			self.vx = 0;
+		}
+		if (self.x < ballGraphics.width / 2) {
+			self.x = ballGraphics.width / 2;
+			self.vx = 0;
+		}
 	};
 	self.vx = 0;
 	self.vy = 0;
 	self.gravity = 0.5;
@@ -57,8 +73,10 @@
 var dragNode = null;
 game.down = function (x, y, obj) {
 	if (basketball.intersects(obj)) {
 		dragNode = basketball;
+		dragNode.vx = 0;
+		dragNode.vy = 0;
 	}
 };
 game.move = function (x, y, obj) {
 	if (dragNode) {
@@ -82,8 +100,9 @@
 		basketball.x = 1024;
 		basketball.y = 2000;
 		basketball.vx = 0;
 		basketball.vy = 0;
+		basketball.gravity = 0.5;
 	}
 };
 // Display score
 var scoreTxt = new Text2('0', {