Cool idea; bad visuals
Looks like a cool idea, especially for a homemade flash game, but the visuals and design are very lacking. Level design is about filling those large open areas with something interesting. So much copy/paste makes it very boring.
The walk animation of your character looks like it's just two sprites and he just glides around. Needs a lot more work to look fluid. Try looking up some tutorials on sprite animation.
The text is hard to read, particularly the red name clashing on the green background. Making it thicker/larger would make it easier to read, possibly with a color that doesn't clash as much as that red.
Also, if you're gonna camstudio, at least do it with your cursor off the window.