The idea is very interesting. Controls should be by mouse I think, this would save time and would be easier, walking around with that speed is difficult. The tutorial had some dark images, and it didn't really explain much. It was more like "try and see" for me. Then eventually I was finally about to create a potion, but just one thing was heal instead of confusion, so I have added poison to get confusion as it seemed so in the book, but it has become something else. I am not sure if it is normal, perhaps I have done it wrong. Starting simple and ramping up would be better, like single ingredient.
If the control system was different and the tutorial were clearer, then it could be really fun, I guess.