I have two things to say.
This demo, wasn't good mate... If you post something this buggy, you will not get good response. I suggest you look at some Game Maker tutorials; there are a couple that teach you how to make platformer games. Just search the Game Maker forums.
Frankly, that pisses me off. How do you know it took him five minutes to make? I remember when I first tried making a platformer game; it was hard work, and the end result was not much better than this. Ease up on the comments lad.