ddk - what's your high score on the demo? I'm not very good at all yet (high score: 6777), but after watching that video I think I should be able to improve a good deal next time I play.
My one gripe with the demo is that it seems too easy to just scratch furiously and make huge chunks of the screen disappear.
My one gripe with the demo is that it seems too easy to just scratch furiously and make huge chunks of the screen disappear.