It ends up being a twitch-click game. My clicker muscle got sore. Still is. It hurts to press keys now.
There doesn't seem to be anything you can do besides take whatever you get entirely at random and try to find the groups. Shake doesn't change things much at all. And in the end, it commits the mortal sin of any game played for score: no high-score counter. Your score disappears in a hurry too.