One thing I really dont like is for some reason it sets itself back to Medium Quality, I play at low for the best performance and this has really screwed up my times.
Alabama.. That would ruin the game. The pieces not falling is what makes this game slightly unique.
One thing I would suggest is putting more of a penalty on overlapping pieces.
It's a great idea, but there are a few thing that need to be fixed. One thing is the difficulty. After a couple waves of enemies you have pretty much a constant wave of pulses. I also noticed that the collision is off. A way to counteract the constant wave thing is maybe to put enemies that are invincible for a slight period of time and could possibly shoot back at you