A simple, solid local multiplayer or multitasking-capability-testing-whilst-solo game! It's rare you stumble upon something like this. Would be cool if you had a bigger variety of levels to choose from, and possibly some different game modes, lengths, etc, but it's cool you can actually change the player dynamics as a handicap. Haven't ever seen that done before.
it feels like a bit of a prototype for something that could be real big! Potential for added AI to make it work with single player too. Great idea.