After a few attempts, level 50 freaked out and all the balls spontaneously grew and nearly touched each other. They kept doing that after losing and restarting the level too.
1) Good game.
2) CPU usage gets crazy, even with visual effects turned off.
3) I wish there was an "event log" type thing, so I could review what the opponent did during his turn. It's frustrating when units to disappear, lose life, or don't attack, and you're left wondering what exactly he played.