What a nice little game!
The graphics are quite nice with a really cool faux-3D effect.
And the gameplay is simple but fun. I like that you can't control your penguin midair, that's a nice touch.
If I have one critique it's that the music get's a bit annyoing quite quickly, but you can always just mute your computer so that's not too much of a problem.
All in all, good job!