Thanks for the feedback ! The movement was essentially taken from another project I've been working on. This jam was a good opportunity to make a full game out of it and learn how to make level design. If you have any additional thoughts on the grapple, I'd love to hear them. I've been struggling on how to make it accessible/learnable for players because it's a very complex mechanic.
The drop shadow is a good call. I had one but removed it because of some build errors I didn't want to bother investigating lol.
Some of the difficulty spikes definitely needed some rebalancing I agree.
On the music looping issue. I fixed it on 1.4.1 I believe. If it's with regards to the loop not being seamless, that's due to us using mp3 files instead of wav files. Mp3 files don't work for seamless looping unfortunately.