Quite a cool idea, like the mechanic with the wall stuck and also the wall jumping, that was really fun.
I just had problems with the player randomly getting stuck while walking around, dunno if that’s intended (since the game is called stuck) but it was very annoying and frustrating to die because of something like that. Also the spike hitbox is quite unfair, it feels almost rectangular, which makes a 3 spike hop soo much harder. I think a few more animations would have been fun, you know for when the player is stuck to a wall, or when it’s a sliding wall & for jumping. It took me a while to understand that you could jump up and away from a sliding wall, and not just straight up, that could have made clearer with animations.
Also your story says to return all the colors to the world. I think it would be cool to introduce them as soon as you find them (in the object of the world and/or the player).