This is a fun take on a mouse-only platformer. The art style is very cute and fits with the simplisticity, and I approve of featuring a slime as the playable character. The game is a bit on the harder side, but. I definitely enjoyed the challenge. Although, some of the levels feel like precision platforming (especially that one thin and vertical level) which is not as fun when you have to essentially guess the trajectory. On some levels it is also easy to land on the wrong side of a falling platform which makes certain jumps impossible. The levels are fairly short though, so they're not a huge deal for me.
I don't know if this is intentional but you can sometimes collide with the side of the falling platform and end up getting recoiled (or you just sort of stick but eventually fall to your doom), which is inconsistent with them only having collision.
All in all, this is a great game, nice work!