Okay, so, very nice! Pretty hard though. And I'd love the character to keep the speed in air... Lot of games make sideways movement the same on ground and in air, I know, but it makes jumping pretty frustrating (for me at least). The art is very nice :) I only think that such vibrant and contrasty background distracts from the actual game elements... Either make backgrounds not so strong, or make the gameplay elements somehow stand out from it, for example making them all black (like in Badland) (and not having black in background). I guess you understand.
Anyway it's great work for 3 hours!