Awesome
Awesome game, definitely really cool, but I wuold have really liked the playing field to be about twice as wide... not only would it have been cool to watch the cave move from that distance by it would've also given me time to respond to the placement of the orbs. As it stands, you don't really have time to react, so it's just chance if you get them or not.
If you get hit at 80mph you should probably explode...
a bit more flash on the graphics and a restart at the bottom, so I can restart without loading the whole flash again (in case I mess up right off the bat)
Overall though, good job.