This game is awesome! I'm in love with the artstyle you put together. I could barely create a few sprites for my game in a month, let alone create an entire tileset and sprite sheet for my game like you did! It's remarkable, and looks really good! I'm also in love with the central mechanic. If there's a game with a grappling hook, I gotta play it. The platforming is also really nice. The player has a great deal of control over how they move on the ground or in the air without feeling floaty. Overall, I respect the effort that went into this. However, I do have a few criticisms:
1. The grappling hook physics and controls are not intuitive whatsoever. I playtested this game when it was still in its metroidvania phase, but it seems like the physics have been tuned somewhat since then. The grappling hook has this weird tug-and-pull affect even when it isn't hooked on to anything, and the recoil always shoots the player back which can lead to some very frustrating moments. It's hard to gauge when hooking on to an object how the grappling hook will react, and I still have no idea how to utilize the bungee mechanic. I've tried holding down the button, pressing then holding, releasing in a direction- all to no avail. However, the effect will trigger when I least expect it, such as when grappling towards something in front of me, launching me into lava. The grappling hook could have used more playtesting, and even a text box at the start explaining how the controls work could have gone a long way towards avoiding frustration, which leads me to my next point:
2. There is very little room for error during a playthrough, and any mistake will set you back to the beginning. I understand that this is typical for rage games, but it isn't my cup of tea personally. The strict timer coupled with the at-times frustrating grappling hook controls lead to an experience where I'm looking to put the game down instead of going for one more run.
That said, I still love this game and even if I think there are a lot of problems with the grappling hook, its still my favorite mechanic of this game jam. Well done!