Fun game, art and voice acting are great, that alone got me to finish the game. The potion idea is a promising one that could be expanded on with more complexity (what if you were able to give potions that they didnt ask for?).
You can give them a potion they didn't ask for, but it just gives you a little text box saying it was the wrong one with a joke. I didn't want to ask my sister to make 40+ voice lines, so having a VA limited the scope a little bit.