Pretty cool and neat game, I really enjoyed it! The only thing I can say really bothered me was not being able to turn off the effect on the screen. The bloom made everything feel hazy and blurry, and I felt like I had to squint to read things.
Aside from that, my only criticism is that when you level up on prestige, it takes you out of the loop instead of challenging you with the next wave and making you get your ass handed to you. I feel like it'd feel more natural if that were the case, and I could accept it being the end of the loop if I either ran out of fuel or died, as otherwise it feels like it grinds the game to a halt.