Neat idea for a game, but execution needs work. The core mechanic, potion brewing, doesn't seem finished / fleshed out. I tried making 3 potions, the first I used 3 ingredients without reading that it wouldn't work in the demo. Then the other 2 potions I believe I made correctly, but I don't know because there was no indication of success / failure and no potions appeared in my inventory.
You're trying to make a stardew valley scale game all at once, but focus on the core mechanics first and then worry about the surrounding features. The game could also use a slower and more thorough introduction.