Cool atmosphere! The set dressing of the city was simple but effective. I also like how grimy and depressing the tower was. It was an interesting choice to make the movement feel so heavy, I think you could speed up the grounded movement slightly while retaining the feel and maybe having an input that makes you drop faster (or even just releasing jump) could help pick up the pace of platforming. I'm impressed you implemented an item shop in 48 hours! Must admit I thought the hook must've been bugged before I found the chain-linked surfaces. I don't know if I'm missing something or this goes against the vision, but allowing the player to jump from a grab would be nice.
I quite like these kind of first person platforming games, definitely develop this further!