I like how it turns out from a happy go-go tune to something more tense. I don't dig much of the new-age 8-bit, but this sounds good (that is, melodies and all :D). Delivers the mood nicely (as it's kind of supposed to).
Also, don't ask why, but the structure reminds me a bit of Doom's endgame theme :D You know, dead rabbit ending (or sth like that).
(If you wonder why 4.5 stars, I rarely give full 5 star scores. All artistic pieces have something to improve, even if it wasn't obvious. In the vote system my vote still goes for 5)

Interesting song. I like how the mood changes. It starts out happy, than tension builds up more, after that it ends happy again. Makes for a nice story. Maybe you made the accompanying instruments during the more exciting part play double speed, to get more variation, and a better sense of climax.

Love the opening theme. It's adorable. And it contrasts the other themes very much. Good job, and
good luck with the contest mate!

This song is adorable, might be because of the bunny avatar. I don't even know why. I can just see a little 8-bit bunny hoping along to this track, great tune! Very addicting.

Dat ending, good stuff.

Really like the panning in this, the snare (sounds like an explosion fx with a shortened waveform, then the full waveform plays after x bars, and that's awesome,) on the right is a little to subtle in the mix imo, like just a tiny bit too subtle.

The sounds/melody remind me of cave story, which is a recent pixel game I played with awesome music x3

Nice track.