Art and music are fascinating, I love it. The gameplay is a bit janky though, understandably you were short on time. Jump should be on 'W' instead of 'Space' (at least allow both), also personally I am more comfortable with Left Click for attack and Right Click for grappling, 'R' for attack feels weird.
Music during gameplay isn't looping so when it finishes there's no music anymore.
You can grapple to ceiling to skip half of the game.
I must mention that I love character design and animations. I hope you make something out of this game with the things you've mentioned, because art and music are amazing (I must say it again).