I think the movement is really solid, and the crawling was fun (great sprite & animation, too), and has potential as a game mechanic! I was messing around with going out of crawl, jumping to another wall, then back into crawl and that kind of stuff. Of course there would also need to be limits on it, because right now you can just crawl everywhere :D But what those limits are could be an interesting design space to explore!
The camera seems to be a bit too zoomed in so I can't always tell where I'm going and the jump was a bit fast (high jump + strong gravity), maybe less gravity would feel better? Or zoomed out + faster move speed with the current settings? not sure, depends on the kind of game you are going for of course...
But overall a good start if you want to build on this further!