Ok, I don't see this game as being any different that other top/bottom 2D shooters. It looks kinda pretty yeah, but that doesn't help it. With so much attention being drawn to stealing powers it would be nice to be able to shoot while you're stealing them. Also, a static upgrade for the base cannon would be nice.
I'll never understand why such buggy games get badges. On survival hard mode you lose life during breaks and if you use the slow down power sometimes the dead enemies still go into the temple and do damage.
A couple of things...First, I don't think any game that requires you to do damage to enemies should be a 1 hit/1 kill on you. Second, upgrades would be cool.
The only addition I would make is a "patrol" choice because sometimes when you choose attack nothing happens. Also, WASD for move around the screen would be good