Very fun, the mandrake level was difficult but I finally over came it. I gave up on the level where you're given the full dragon teeth. At that point my brain couldn't handle creating the listed recipes by balancing space and random ingredients. I think it could be made easier by just simplifying the recipes a little bit. In stead of requiring exactly 10 specific items for the dragon potion, only require 8 specifics and 2 fillers like the apple juice potion. that way players can correct mistakes and handle random ingredients more easily. All in all I spent >30 minutes playing and had a lot of fun! I love the "using the leftovers" idea, and it's a great way of explaining the odd shapes that you have to work with! In the end I found myself "bouncing" away lots of ingredients because they weren't the right type to make the special potions. I'm not sure if that was intended or a misplay on my part. One simple change would be to show a faint grid aligned with the item sprites, so it's easier to tell their exact shape, I was confused on a few to start with (like the full purple flower).
I love the art, love the story, very fun and challenging!