I liked the game a lot. There were things I didn't like though:
I think it'd be great if the player could decide how high the jump could be. that'd make platforming a lot tighter. No background music? how come? that's all this cute game is missing bro! There are a ton of free online resources you could use. I'll be making a demo of my game, hopefully people will play it :D. Keep it up!
There is background music! How are you playing the game? Try pressing space (the background music stops after finishing a song currently, unless you start it up again).
I went with a specific height jump because it would allow me to go with a certain kind of level design. If I changed that now, all the levels would have to be adjusted. The lack of influence in how high you can jump is part of the difficulty.
I'd love to see a link to your demo once it's up!