Seriously mate, look I myself can't program to save my life and I think my dog could do better. The door doesn't walk on the path but two rows down and that completely throws off the whole gameplay as you lose all perspective and depth. Then the door itself has been badly photoshopped (there's still a white line round the edge). As Yuhwryu said the graphics are basically Mario. I spent half my time making the door fall THROUGH the floor just to see whether or not it would reset properly and then my finger accidentally touched the crouch key and I went down but not off the screen and there was no way for me to get back up. In the end I had more fun playing keep the door off the floating platforms than I did playing the game and after two minutes of solid gameplay I am still none the wiser about what was actually supposed to be happening.
Maybe next time, test your games before you post them on the internet because otherwise all you'll be left with is: ridicule, embarrassment and withering condemnation for the rest of your time on Newgrounds *probably*.
Have a nice day :D