Wow, this game is awesome!
I really enjoyed the gameplay, the flipping bonuses and all that. The boost is a great mechanic and makes me feel like I'm biking on air. The most satisfying parts of the experience were the automatic checkpoints (much appreciated), and the tight rotation controls. Seriously, usually these games have a follow-through style of rotation and it always throws off my tricks. Not this time!
The music is groovy, the art is basic but humorous, everything seems to be working out! I see you promoting this game in many places, more people should really give this a try. Awesome job!
(I did like 6 flips in a row once it was so cool)