I actually enjoyed the game a lot more than I thought I would.
Granted right now the enemies comes in three shapes, bugs, flying bugs and shielded bugs, but it is a fun, fast paced arcade shooters.
Thus far each level has had a bit of variety in tons of both looks and objective. As Magus pointed out, it is possible to get swarmed by enemies especially when you take the wrong turn.
I did enjoy the one boss fight we had so far, and the plasma whip is a cool addition to the game. The game isn't pretty, but for 10 bucks I don't think you can go wrong.