Phenomenal art and music, and the game play felt pretty good. There's a lot here for the jam period! Three floors with unique enemies, music, and graphics is pretty commendable. I liked the game enough to finish it twice to see more items and weapons, and I ran into a few bugs on the second playthrough. The biggest one being that you keep everything from previous playthroughs into future ones as long as you don't close the window and don't die. On subsequent playthroughs I skipped the intro cutscene, though, which might be meaningful here. That also might be responsible for some of the other bugs I found:
- The chainsaw just doesn't seem to work sometimes. I only found the chainsaw on my second playthrough. I picked up 2 projectile size upgrades and tried using the chainsaw, and it usually worked, but sometimes it wouldn't deal contact damage unless I made sure it wasn't overlapping any enemies first before using it. It wasn't able to damage the final boss at all, though. Unsure if this is a problem with the chainsaw or the stacking size upgrades.
- You have full player control during elevator cutscenes. That means you can use weapons and consume ammo, which some might find annoying during a cutscene. Could be a bug or speedrun tech, I didn't try to see if doors worked as well.
- Killing the second boss with a chainsaw causes this to happen, where the elevator opens, and the fight ends, but the boss sprite and health bar are still visible on screen. Touching the boss sprite at this point does nothing.
- I first triggered this on my second playthrough with the mega chainsaw, but I don't think the second playthrough shenanigans had any affect here. I was able to recreate it again by killing the boss with a normal-sized chainsaw on a fresh playthrough.
- Buying multiple copies of a weapon allows you to get extra ammo back from the half ammo to all weapons box. You get half ammo per copy of the weapon you own (I think, buying two copies of a weapon gives you full ammo on future box pickups each time when you should only get 50%).
Most of these are just weird quirks and didn't detract anything from the experience. I figured I'd mention them in case you want to keep working on the game after the jam. Great job!