First off - that is a pretty unsettling background image to put in the back of every level! That had me a little unnerved right from the start - so, starting off strong there. Great job on the sound design! - even if I felt that the game was probably in need of a more dramatic death screen... and, it kind of has the Alan Wake issue where enemies get stunned by you looking at them - but, the battery running down on the flashlight, and it needing to be charged by shaking it, thus attracting more enemies, does negate that somewhat. I got as far as level 5, and that took me several retries!
However, what I would say is that the purchases/upgrades shop? Yeah, I didn't really use it. It doesn't feel like a great fit for this type of game, what would of probably worked better imo is enemies with different attack styles (maybe once they spot you they charge and can't be stunned with the light until they get really close?) or more variety in pathfinding, or more player goals - like having to find a button to open a door to get to an exit door after finding presents, which would require backtracking or running in a loop of some kind to escape the enemies. I wouldn't say that it *hurts* the game by it being there? (The upgrades shop, I mean) - it just doesn't add anything, imho. Regardless, this was a great, simple jam game - and in my book, you also get extra points for using Godot ;D