This is a fun shooter, my best score was 269 kills. The upgrades are quite well balanced, it felt very strategic choosing which was the most useful thing to upgrade. I think the difficulty ramps up a little bit too quickly, as it goes from quite easy to insane within a couple of rounds. It gets particularly difficult when you run out of space to run away and you can't pick up any fuel because they are swarming all over it. But it's still fun trying to get a high score. I liked the lighting effects and the use of the focus. Nice work!