My brother showed me this game the other day and I ended up buying it off Steam after "trying" it. Oddly enough, after I legally obtained the game, my Arial font messed up and I had to fix it... see what happens when you actually pay for software?
But it's pretty fun overall. I really enjoy good music and frankly one thing I like in this game compared to something like Guitar Hero is that the music is prominent. I hate how in Guitar Hero, I'm playing a song and I can't hear the lyrics or half of the other stuff... only the guitar. Yes, it is Guitar Hero, but I LIKE MUSIC. Guitars are not the only part of music for me. But anyway, back to Audiosurf. I found that playing the game with some really crazy techno songs is pretty exhilarating. I play on umm the second easy mode (the one to the right of Mono). It actually gets pretty fun when you start trying to get a little bit of strategy involved. The only hard part about strategizing is that it's more luck than anything. You don't know when a paint block will come, so you won't know to purposely stack different colors. The same can be said about the black block as it's easier to let there be nothing in that row rather than trying to clear the stuff blocking it (as you cannot forget, a paint block will also remove the black block, which is probably worth more ).
I think my favorite song to play so far was Vitalic's My Friend Dario. Other than it being a rockin' song, it was pretty intense at some points.
I wonder if there's any plans to port this on XBL? It's already got the $10 pricing on Steam (same as the 800 MS points).