===================================================================
--- original.js
+++ change.js
@@ -8,9 +8,9 @@
 		anchorY: 0.5
 	});
 	self.speedY = 0;
 	self.gravity = 0.5;
-	self.jumpForce = -15;
+	self.jumpForce = -20;
 	self.jump = function () {
 		self.speedY = self.jumpForce;
 	};
 	self.update = function () {
@@ -20,8 +20,15 @@
 		if (self.y > 2732 - 25) {
 			self.y = 2732 - 25;
 			self.speedY = 0;
 		}
+		// Make the player land on platforms
+		for (var i = 0; i < obstacles.length; i++) {
+			if (self.intersects(obstacles[i]) && self.speedY > 0) {
+				self.y = obstacles[i].y - self.height / 2;
+				self.speedY = 0;
+			}
+		}
 	};
 });
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);