Love me a good survivors game. Great job with this! I like the idea of using inventory space for the theme, choosing places for powerups was pretty novel at first. But honestly, the player levels up so slowly after the first few upgrades that I wasn't able to ever max out the inventory. Also at some point during my run, the game just... closed? Didn't crash, the window just stopped being a thing. I was having fun though, and that's important. I don't think the Gameboy'd be able to render so many enemies to the screen at once, but that aside I really liked the sprite work for the enemies and player. Had a great time overall, be proud of this one!
Also, when I reopened the game, the mouse was in the window and transformed into the left-right drag icon. I dragged out of curiosity, and the window froze then closed. We love game jam bugs!