Audiosurf is an indie game available off of Steam for just a few dollars, and it will be on sale for 1.49 cents for a little while. You import your own music (directly off of iTunes or you can use the built-in "radio") and the game will build a track based off the music. You pick from varying characters, which have Casual, Pro, and Elite difficulties. Each character has its own special abilities and ship. The goal is to rack up as many points as possible by hitting colored blocks and getting combos before the song ends. As the song gets faster, the track slopes upwards and the blocks will get "hotter", changing colors. The hotter the colors, the more points. However, the speed of the song also effects the speed of your ship, and there are grey blocks, which take up spaces in columns and give no points until they are hit 3 times with other blocks. There is no way to be killed, except on the Pro and Elite difficulties. The blocks are stacked in columns when hit, and if you let them overflow, you will die and become a ghost, unable to get points, until you re-spawn. in Casual you simply lose points.
Screenies!
Damn it, FRAPS is making my cursor show. It doesn't actually show in the game except for menus.
the character select screen
two screenies of the starting sequence
a slow bit of the song
a song at one of its most intense points
the pre-start menu
the pause menu
the ending of a song
the end-of-song screen with leaderboards