===================================================================
--- original.js
+++ change.js
@@ -24,9 +24,9 @@
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
 	self.speed = 10;
-	self.jumpSpeed = -60;
+	self.jumpSpeed = -30;
 	self.gravity = 1;
 	self.isJumping = false;
 	self.isFalling = false;
 	self.update = function () {
@@ -42,9 +42,9 @@
 			self.jumpSpeed += self.gravity;
 			if (self.y >= game.groundLevel) {
 				self.y = game.groundLevel;
 				self.isFalling = false;
-				self.jumpSpeed = -60;
+				self.jumpSpeed = -30;
 			}
 		}
 	};
 	self.jump = function () {