I really like this! The art style is really nice and it's obvious you put a bunch of work into this!
I do have a couple pieces of feedback from what I've learned about platformer design over the years. I hope some of it can be helpful to you:
1. The cat controls like it's on wheels, rather than a living being. People don't have such long acceleration and deceleration curves. Make the cat reach max speed faster when I push the button, and make it decelerate faster when I stop pushing the button. You'll find this makes the controls feel much tighter, creating a better experience for the player.
2. This is an excellent skeleton of a platformer, but next time you should put more consideration into what your core mechanic is. There are a million run and jump games out there, so to stand out you need to do something different. For instance: Celeste has the dash mechanic that makes it stand out from other platformers. You seem to have a wall crawling thing going on, but you only used it a couple times. You should center your level design more around the mechanic you want to show the player. Here's a video that goes over the platforming level design philosophy for mario 3d world. You don't need to copy it exactly, but it should give you a clearer idea on what I mean by focusing the level design around mechanics more
To reiterate: this game is awesome. You guys are all awesome for having made it. I can't wait to see what you make next!