This game is really hard , I gave up after three game overs without knowing if I made meaningful progress. The precision needed for some of the grapples is really high, and with the game over mechanic i ended up not wanting to have to do really difficult sections again to get back to where I was. It might be a personal preference thing, but I'm not sure having a game over screen works to your advantage. Using the grapple and jump in combination was kind of awkward to me just due to the keybinds. I kept accidentally grappling instead of jumping and vice versa. Skill issue on my part maybe :)
That said I liked the art, the character sprite was cool especially. Also the sound/music was really good. The gamefeel was generally pretty nice and I think there's a solid basis here. I think the level design was based around some cool interactions between the grapple and jump. With a more gradual difficulty curve I could see it being super fun!
also don't be so self deprecating in your game description ;)