the gameplay itself is fun AF it nice messing around with the ability , I feel like the player acceleration might take bit to long to start running it kinda give me anxiety XDD and make it feel like running is useless when you can do the slides or jump, I mean you might wanted to take it this way but just saying.
The side wall run might be a little buggy sometimes. the player wasn't able to "decide" which direction to go(im impressed tho, from the way it works as you explained in the video although the complexity sounds pretty high (I learned computer science for few years, its my first few monthes on unity so Im not quit sure) but it sounds good and still it works smooth so I think it shouldnt bother you much).
you said you hate fixing the ledge grab (I also hate it in my game tho XDDD) but it also a bit buggy the player teleported higher few time, and once i messed around really bad with the - slide ,jump , ledge grab and wall slide and the player had suddenly entered the holding edge state and preformed the climb animation and end up in the idle animation in the air. the input might was laggy or maybe you make the animation transition according to the input and not to the actual player state (you might using crossfade animation when key pressed insted of using a parameter to switch or switching to the animation while the player is already in the climb state).
ohh and last thing the car on the roof was little buggy to I had you exit and enter few time until it was able to move.. didnt check it too much tho..
ok it long enough XD but here is the conclusion XDD:
so the demo was very fun I might added like idk double jump/air dash or little air dive when you press the O butten on ps controller or something that will accelerate while youre in the air I think it will be little more fun!,
when you wall slide and preform a jump, I fell like you need to have more control over it for how far you want to jump from the wall (maybe for the regular jump too)
mmm and I think thats it!
you done great job!!