The upgrades are a bit slow going for my taste (going from 1 damage to 1.1 damage amazing lol) , you have to keep in mind people play jam games for a maximum of 5 minutes.
I persevered because I really liked the vibe. (also mouse sensitivity options for an FPS game THANK YOU). I can tell just how polished everything is.
Another important note: the font is toooo small and blurry, fancy serif fonts are unreadable enough but the text is getting cut off too. It makes it hard to see the cost of the upgrades (which should be waaaaay bigger and visible instead of the same color and blending with the description).