Super fun game, I think the design is smart since you have to choose perks that synergize best with what you have remaining. Sometimes it was tough to see exactly everything happening because of the various items, bullets, enemies, and particle effects on the screen at the same time. I also found that the very dense enemy spawns coupled with a fairly short immunity timer made for some quite unforgiving moments where a large portion of my health bar would be drained instantly. I also wish there were some more mobility perks included to make getting out of tight spaces easier. However, I think that these are small balancing issues to address with the gameplay. The audio and sound effects are great, and I really love the pixel art as well, you definitely nailed the presentation! Overall, nice work!