I want to rate higher because I love the concept. I just think the grind needs to be lessened a little bit. I was unwilling to experiment much with potion making because resources are tough to come by, and making an incorrect choice just results in nothing. 

As I said though, I really like the concept. I like the free-form nature of exploration and experimentation, and I feel like you've implemented enough features into the game to keep it interesting for awhile. I'll be checking back, and I will adjust my score with future updates. Nice work so far!

Edit: I likes it. 5 stars.