Very difficult at points (moving single sparks between several boxes), but enjoyable and quite interesting. Good length for the material, and I like that you can change the color for a stage by restarting if it's too searing. Quality game.
Quite short, and pretty easy. Gameplay wise, it's like Trauma Center meets the Dark Ages. It's a good idea, but would benefit from more, and harder stages.
It's telling that the badge for "beating" the game is medium difficulty. It's a stylish game with a fun mechanic, but it's easy and far too long. Good time-waster though.
It would be nice if the game were as exciting as its music. As it is, I found myself actively seeking out the "faster ball" powerdowns so that it would feel more normal. Other than the flashiness and some interesting physics, performs worse in every way than its intellectual parent, Breakout.