Pretty big file.

I don't know, but this seems like a huge file size for this kind of game. I don't really know much about compression in Flash, and I'm not decreasing my rating because of this, but maybe the file size of the music needs to be shrunk a little bit. 2.1 MB just seems too big.
Aside from that, it's okay. The drift is a bit of a problem for me. I would try to maybe slow down the drift a little bit or implement a feature that lets you get rid of it without turning, like a rocket on the front that counteracts the ones on the back to slow you down.

Idea sounds like Squarepusher...

I like how this sounds very unorthodox but pleasant at the beginning. You're building a soundscape that really works and I am enticed to listen to it. However, at :19, I feel like it temporarily goes flat and kind of repetitive. Still way better than I could do, though.
You have me interested again at :38. This is really good. Energetic and a little strange, and the bass fits right in, which is not what I was expecting from one recorded live. You did a good job minimizing any unpleasant room acoustics that there might have been there.
I enjoy the glitches in the beat by themselves at 1:16. You've got a great song here so far. And how it subtly builds itself back into 1:55 is good, too. After that, even the repeats of the parts were nicely made, with enough differences between them that you don't get bored. I liked the weird ending, too.
This is a great, nice downtempo song. The only thing I would do to it is to change up the synth at :19 a little bit. Other than that, though, you have just gained a new fan.

Good.

This is overall a good song in terms of melody and beat. However, what I'd really like to hear a bit more of in the song is some louder bass - particularly after the vocal sample at :17. It sounds sort of empty to me without a strong low synth. Also, I'd repeat the previous reviewer's suggestion of a nice piano counter-melody. That would make the section great.

Alright, but...

the song in my opinion sounds a bit disjointed in terms of transitions between your chord progressions at some points (such as the transition around :30). Also, your synth at :45 sounds a little clashy with some of your other synths.
I would additionally consider trying different timbres for synths to make your song sound more professional. Perhaps getting something that fills the gaps in the sound spectrum (i.e. bass, middle, treble ranges) would help. Maybe a pad?
Overall, though, it's good.
7/10, 4/5