Very simple but smoothly executed.
The camera zooming was a nice touch.
I have two gameplay complaints:
- The random placement of additional vacuums can have too much impact on score. (Spread out vacuums = wider coverage and wider camera view, a distinct advantage.)
- Since the phantoms and powerups never despawn, and don't seem to spawn faster when actively playing the game, the same score can be reached by just doing nothing for most of the game then running around sucking everything up at the end.