Really nice game!
I'm not a fan of the orange slime levels. I didn't really understand what to do, and still could easily finish them. Didnt feel like solving a level of a puzzle game at all.
The green slime works well, but it's not as visual pleasing as the rest of the game.
I hope you will continue working on the game and add more levels. I would happily buy a bigger version of the game! :)