The game became unplayable for me due to lag. It started out OK, but the more I played the slower it got. I checked and couldn't find any way to change the quality of the game.
I assume this is my computer, but it's still a bummer there are no ways to try to improve quality. For example, do I really need to render and draw space rocks, birds, clouds, and ghosts when they don't do anything at all? Why can't I turn things like that off to improve the game speed? What about other racers? Do I really need 13 other bikes? Can't I just race against a clock or something instead? The lag got so bad, that the game literally froze for a few seconds on every single corner.
I don't hold too much against you, it's a neat little game.