there's a dungeon iff you turn left while exting the the first corridor in the game. if you play and pass the levels of the dungeon you can earn coins and blue and orange potion as well.

in jane's house there is a door, but it ddoesn't give me the option to open it. I know there's a chest of coins outside. And the chest in the house in the forest, where there is a painting in which we find blie root, isn't opening as well. Doesn't give the option.

The haunted house is locked and is opened with a key. Where is that key?

The only potion that i can brew is speed potion. How can i brew other potions?