Nice game - love the graphics, and the gameplay idea. The design of the whole app -- visuals, navigation, playability -- is superb. Everything looks good and feels right. There are only 2 items I can see that need improvement: Computer AI and Audio.
I haven't played multi-player yet, but I will say the single player AI could use some smarter play styles. He seems to move completely randomly, without any sense of a real opponent. ( tried MP, but it could never connect to the server, and I don't have time to reconfig the router,if that is actually the problem)
I think the audio side of things needs some help. You're good good sounds on the Crocodella splash screen (cool anim, too), and then the strings on the title screen. During the game, some level of music would be good, as well as maybe some variance/multiple sounds for the falling blocks. That whistling sound over and over is driving me crazy! (not in a good way)
(iPod Touch 3rd Gen, iOS 4.0.2)
These items notwithstanding, it's a fun game - thanks for making it!