Space-man Adventure

I recently started playing around with game maker, a program I've known for years but rarely used, and created four levels of a game, i thought they were good enough to share with the forum so here is my game!
http://www.mediafire.com/?nrnd1tzctnd
Game Maker download http://www.yoyogames.com/gamemaker
I liked it but I want your opinions, if you have any suggestion or questions please don't hesitate to post!
thanks, Willomo

Good concept but it is very short. also a little too easy.

It needs more graphical polishing. Take a look at some the staff picks on YoYoGames, and use those as models (I'm not saying you have to copy them, though )

Also, the movement is a bit stick, i.e. if you switch from moving left to moving up without releasing the left arrow key, the character just stands still.