Nice little sokoban puzzle game! I will always go for a puzzle game no matter what, and I like this quite a lot too! The 8-bit music and art is such a match, the gameplay is polished, the levels are very well designed and guided too. It's a bit on the easy side but it's still good.
My little nitpicks where that the corner tiles although looks great, feels a bit misleading. It make me subconsciously believe there is still one square of space but in reality there isn't. Also it would be nice to have a restart button too on the keyboard, rather than using the mouse. Just QoL stuffs really. The potion brewing mechanic is the least explained mechanic in the game, and it took me quite some time to realise what the empty bucket and flask does. Maybe don't provide them in the start?
And, what does the block in level 5-1 suppose to be?
Anyway, the game is great and I'd say it's a job well done!