I rather enjoy the game, though it gets a bit tedious after a while. There are a few gravity oddities, especially when two fast-moving balls strike each other.
A rather boring button-masher. I gave it a 3/5 for accomplishing what it seemed to be going for... then I got to The End.
Sadly, this game fell into that oh so common pitfall of 'let's make a big badass at the end!' Unfortunately, having a boss with more power and hit points than the rest of the units you've fought against combined isn't 'difficult.' It's just annoying.
Especially when there is no real power curve to this game. You fight the same baddies with the same abilities in essentially every battle. Most of the upgrades you receive aren't even necessary until the final boss.
In the end, I give it a 2/5.