So this is where it all started! :D I like the idea, but the mechanics... man, just jumping up the stairs proved a challenge, and when you're walking and trying to jump at the same time it doesn't really work, not to mention if you run into the hole in the floor the level doesn't restart, it just keeps going without you in it. Reloading multiple times as once was a bit weird, but maybe you get used to that.
I like the crisp pixel design, and Doop (assuming that's the main character's name) seems like an interesting dude, but it's not as smooth as it could be. Good start though. Design's good, but mechanics... not so polished.
-cd-