It seems like an awesome little game, with great music, but there's nothing to keep me coming back for more. You essentially just keep turning and keep turning and win. There's really no catch. Nice try at being unusual though. :)
I agree with what everyone else has said. The trails are way too short and it moves way too fast. If one of the two were fixed the game would be fine. Both together make it far too difficult.
This game could be easily addicting and I love pretty much every interpretation of it. Now if this one only had better, non-ear destroying sound effects . . . still, it's very good.
I like the Simon twist. The game is simple and minimalistic, but it doesn't need to be anything more than that. However some simple sound effects for us that "play by ear" wouldn't be a bad idea.
@Twilight_Ninja: Use spacebar while you're standing over the switch. @Gengii: When you use the keyboard shortcut (the letter in parenthesis), press enter to confirm that's what you want to do. It's like pressing Y.