Let's go with the obvious- game has to have a title, and you have one of the better ones! Other than that:
Very pretty environment. Nice animations. I'd say visual presentation is pretty good. Audio isn't as good. Sounds sound muted for some reason.
Next- I think gameplay would need some balancing. You start with the frog boss, and he's relentless! Nothing wrong about that, but at the same time your character moves pretty slow. Same with the attacks- bosses' have more range than yours. Even the animation of your attack seems to suggest that attack should connect, but in fact it doesn't!
Over all- a good looking game, with nice premise, but some balancing issues.