Great Gameboy look/feel/music.
I think the things you are fighting should move a bit slower at least at the first levels, also them being able to move through water where you cannot seems unfair, would also be nice to have a bit more time to pick up the "loot" from the bodies as they can disappear before you get to them even if not very far away. I also one time one of the sprites seemed to split in half and have an empty tile drawn where it should be, don't think it was meant to be that way though. And as mentioned the hit boxes, that the enemies seem to be able to just walk through, make it difficult for the player to get around but the enemies have no problem so evading or getting an attack is more difficult for the player.
Also, I know this was a short game Jam but the action felt a bit too repetitive, though not sure how to make it different. Maybe have some levels where you just search for things and not all fighting? Or combine them?
That's a lot of negative but they're just little tweaks that would make this more fun for me, likely others won't agree. But overall I really liked the Gameboy soul of the game.
For anyone who tried to play it and it didn't work in chrome, make sure to turn off the blocking of 3rd party cookies as the game uses local storage, likely for game state, so it gets blocked from playing without it turned off.