Overall this was a pretty fun platformer! Controls aren't the smoothest, and I'm really missing a more visual health bar (for bosses in particular - it's easier to feel an incentive to keep fighting if you see that you are actually dealing some damage). Also: would be nice if the main character stood out from the main background more, they both have similar color, but other than that it was fun! Varied enemies (though not so smart - they're easier to attack if you get behind them, and easier to avoid than attack), obstacles and levels. Just about long enough too. A bit smoother control, interface and visual contrasts and it'd be perfect!
Regarding the time limit, was it made for Ludum Dare by any chance? Should tag it with that if it is, so it shows up in the collection. :) Good game.
-cd-