I bought Zoop. Great little game. Actually bought it because I really wanted a game of Plotting and I recalled from the demo it had certain traits to Plotting which wasn't released on the PC. Zoop would be very easy to make too.
I know I started referring to Zoop as a stress test in a box. When you play continuous and make it to level 10 you start getting really stressed out with the rate those things are coming at you at.