Pretty nice graphics and fluid movement. I like the idea of wormholes to fill up the control bar. Also, the universe going haywire when your control decreases was implemented pretty nice.
I wish the crystals were more common. Probably you could make it so that almost every asteroid drops one but maybe make them give different amount of control. Otherwise it was kinda hard to get what you need to do as shooting the asteroids seemed not to do much. Small crystals would show the goal in this case I believe.
All in all, nicely done!