Was this play-tested? I just tried the second level on normal difficulty (after failing spectacularly at Maestro difficulty on the first level and finding no way to back out of the level), and the game expected me to hold down six keys at once—which many keyboards are physically incapable of registering. This wouldn’t be a problem on an iPad that can register 11 simultaneous touches (there was a mention in-game of “touching” the turtles), but it doesn’t work with many physical computer keyboards...