I really like this game - the idea, the use of red/green to clearly delineate what you're supposed to destroy or avoid, and the level design. The wobble effect made it almost impossible to play for me. I hear what you say below about it being too easy without that though and I think I would have liked it more if there was a difficulty selector at the start which modified the wobble amount, perhaps with the existing level being labelled as "hard" difficulty! Overall a very nice game though.