Really cool concept. I think a few improvements and it will be a classic.
The issue I had with this are:
1) Starts too slow, needs to increase speed non linearly. Maybe at first speed steps are big, then speed increase slower as you reach higher speed.
2) It's hard to see things that are bellow you because the snake occlude your sight. Even with the transparent thing. Need to figure out something else that also looks nice visually. Sometimes eye candy gets a way with functionality, it's a conflict.
3) The music is a bit too fast, especially at first when you go so slow... but it's a nice track.
Overall pretty unique.