Nice entry! The narrative bit at the beginning was great and the mechanics of your game are really cool.
I got stuck on level 8 and ended up skipping it until getting stuck again at level 12. After that I didn't really try to beat any levels after that. Just checked them out to have a peek.
One thing I'd suggest is making it so after the player gets the potions the first time for the level, that resets after that point wold automatically start the player with the potions. (Or maybe a toggle in options to make this the case?) I feel like difficult puzzles are going to frustrate players to an extent by design, so doing anything to avoid unnecessary frustration would be good in my book.
I feel your puzzles had a really good flow in introducing mechanics and then iterating on them until introducing even more mechanics. Some of them seemed really clever! Well done. I feel like this game would be worth continuing after the jam no matter the results of the jam itself. Some more mechanics/potion types, some optional challenges of higher difficulty, and some more narrative bits interspersed throughout and I feel you'd have a winner for making some side cash on Steam. Heck, maybe even get a talented artist onboard and do a lot of playtesting and you could have a top seller on hand. Good luck!