In each level, you need to collect the golden coin, escape from the slimes, and destroy them if possible. The girl can collect magic potions that help to lift big wooden blocks and slimes. After lifting the blocks or the slimes, you need to drop them in the right places. There is also water in the game, and you can drop things in there. You can move blocks, collect them, and drop them. You also need to lure the slimes in the trap, throw boxes in them, and push them into the water. But all of these things you can do are not obligatory, the main thing you need to do to pass the level is to collect the coin.
Walkthrough: https://youtu.be/f9EXSAQQda8
Update 1: Changed text for 2 levels.
Fixed walls for 16 level and bug with key and spikes.
Update 2: Fixed cases: corpse to water, and box to сorpse.
Update 3: Fixed case: slime moving into slime (level 22).