Nice start to a game and you've noted a good list of things to add in the future.
For feedback:
In-game, you may want a small description saying that you are an alchemist and need to restock your supply of potions (something like this). Otherwise it's easy to wonder, 'why am I making a potion of courage'...after I make it, will I use it? Fight something? Need courage for something? Take the description from the game page, and add it in-game.
Appeared that gameplay was designed to get first item on list, put in pot, get second item on list, put in pot...this certainly worked, however, my instinct was to just go gather all the items and return to pot. For recipe one, this was not a problem, however recipe two required a strict order. It was also required to have the precise amount, not too many, or it keeps adding beyond what is needed and you fail. Also, pot might be allowing multiple interactions while adding item animation is playing. As example, for recipe one, if I gather only two philosopher caps, press 'E' to put one in pot and then keep pressing E multiple times in a row while the animation is playing, when the animation is done and time to add the second, it is a fail...as though more than one were already added.
I like the jars you have at the very start to show what each mushroom looks like. Seeing those jars didn't register for me until the third time I started back at the deck. I think due to coloring they blend in so much that I didn't really notice them enough to realize what they were.
The environment and forest sounds were very effective to make me feel isolated in a large forest. Color palette made it feel like Autumn.