i fund out about this agme a whle ago. pretty ccool. check out www.lineflyer.com. they got new versions with different vehicles other than just a sled and a beta version with an undo feature.
I personally loved the game, but the guy fell off too easily sometimes it seemed. I want to be able to get SPEED and make it through multiple loops and possibly be able to make it back to the beginning. Maybe if the author put in a 'ball' mode that lets you be able to do this with much less friction. But the whole concept of it is what made it so addicting. The author did say it was unfinished so maybe?