Great game all around! The graphics and animations are really beautiful.
I liked the music choice and while there are some sfx missing, the ones that are there are good too.
The levels are also well designed. They make use of the different slimes mechanic well and aren't too difficult.
I somehow managed to soft lock the game on my first try though. I forgot to pick up the red slime and reached the checkpoint next to the red door without it and couldn't go back with the green slime (it can't make the jump back) so I had to restart.