Hello, tried out your game and it's actually really impressive for a game jam entry made late and submitted early. It's very fun. Mostly polished. Great speedrunning potential. Here are some of my suggestions, if you don't mind.
1. Make more levels if you like working on this game. I feel like certain players would really like this game.
2. The movement is great. However, in my opinion, it needs to be more forgiving in some areas. I'm talking mostly about the grappling and grapple range, it could be made slightly bigger, just slightly more so it's less frustrating when you are falling and fall out of the grapple range really quick like in level 2. But that's my only complaint. You get used to things over time. I was stuck on level 2 for over 3 minutes and yet had fun so it must've done something right.
Anyways, TL:DR: Good game. Has potential.