<3 <3 <3 <3 Genius!
I fell in love with this game just a few moments as soon as I saw the tetrads falling down. Excellent idea and implementation, a little dissapointing there were no other enemies but that would have been difficult for balancing I suppose, so it doesn't hurt the game. Very fun and clever.
I would LOOOVE to see more games in this idea of cross mechanics implimentation, and using old games is a brilliant idea. Five stars!