Boring

Worst part: power "downs" curve towards your paddle making it really hard to avoid. Second worst part- level 9 and 10 take way too long. I gave up on the game at that point.
Best: its nice looking with a mellow soundtrack.
I got it free via Starbucks so Im not too disappointed but wouldnt pay more than 99 cents for it.

SacredChao about Grey Cubes: Unique 3D Brick Breaker