OK I'm gonna be brutally honest here, no beating around the bush;
The most notable problem with this character is the sprites. The lines are shaky, there's a very clear lack of form understanding, his tail sticks out of his shirt for some reason, there's no shading going on whatsoever, his shoes are more or less just orbs, and he kind of flosses when he walks..? Definitely watch a few sprite tutorials or just art tutorials in general, you could really benefit from it.
The other and objectively most important elephant in the room is the actual gameplay. He is far, FAR too fast to be handled well. Best thing you can do to rectify that is remove the dashmode; not every character needs it and the sheer amount that have it makes it tiresome.
The wall jump on the other hand; it controls, and pardon my French, like dogshit. Sometimes you'll latch onto a wall, sometimes you won't. You just kind of have to pray. And even if you do pull off a wall jump, there's no real propulsion from the wall. You just.. let go. There's literally no point to it.
The jump ability is... it's not bad?? It's ok I guess?? It's really nothing special, just a thok with a little verticality. Nothing that negative to say about it really, but I do think a little more thought could be given than "thok, but make it go uppies".
Overall, you've got a long way to go in terms of quality and playability. Not to put you down, not to deter you or anything, but as it stands I would not use this character in casual gameplay. I would not boot up SRB2 and load up Jason The Fox for a fun few hours. But who knows, with a little grit and determination maybe you can get there. Maybe someday people WILL load up Jason The Fox for a fun few hours.
My advice, watch some art tutorials, put more thought and care into the playability and fun of his moveset, and this'll shoot up in quality in no time.
the wall collision, blame BuggieTheBug for that, he was the one who made the wall collision thing that registers if the player is touching the wall. Your hitbox needs to be touching the wall in order for you to climb, and much as knux climb, you cannot hold yourself onto unclimbable surfaces. As long as its tagged "unclimbable", im sorry, you cannot get through there.
The thok its from Rocket Jump from TeriosSonic, it has been chosen and kept, because it doesnt count as an actual ability for Srb2, which allows you to keep on climbing on the same wall, if you cant find a suitable one to wall jump like Mario, doing a zigzag from a wall to another.