Very fun game, loved it!
However, this is a personal gripe of mine - don't take it at heart ^^
There is nothing more infuriating to me than getting stuck on a pixel and not even being able to turn, being forced to reverse only to get stuck on another pixel. This happened several times.
The rage only made the ending better.
(Edit: I gave it a really high score! I just wanted to share! Great job man :D)