Mixing potions in a slime girl is a really brilliant idea! The amount of combinations is truly staggering, and it feels really good to interact with. Each new day was a fun rush of figuring out what all the new potion varieties and transformations did, which was really neat. I only found the potion storage late into the game but that was a brilliant addition; it really does make it feel like you’re able to stock up inventory like a real shopkeeper. Having this alerted to the player earlier would be really ideal, since its not immediately obvious.
I did find the days slightly too long, with customers not coming along quite enough to enforce any sort of pressure on the player - I also found in my run through that they overwhelmingly asked for potions from the first two days, which meant curiosity was the only reason to mix up some of the new potions.
Solid gameplay loop, and great transformation kink content!