You want beer. So then we need to go to the pub. Use the ladder to go downstairs and use the door to leave the house. Use the door of the pub to enter. Oops. You have no money. And no money is no beer.
Enter the house to the right of the pub. There’s a sick man. But if you can cure him, he can pay you. Leave the house again and enter the cave. It’s the pharmacy. Now the pharmacy might have a cure but needs a leaf and the recipe book. So leave the cave again.
Left of the pub is a ROCK on the ground. Pick it up. Move the mouse all the way down to access the inventory and try to throw the rock at the leaf on the tree. That’s the one the pharmacist wants. Actually, you shouldn’t hit the leaf but your window. When the window is broken enter your house again and use the stairs to go to the upper level.
Use the window to take the LEAF. On the left is a cabinet. In that cabinet is a BOOK. Take it and use the ladder to go downstairs again. Leave the house and walk all the way to the right, into the cave. Give the book and the leaf to the pharmacist and you’ll get your POTION in return. Leave the cave on the left.
Enter the house on the left of the cave and give the potion to the sick man. He’ll pay you with some real MONEY. Leave the house and go to the pub. Enter the pub to buy a beer.
Game source: A copy of the game was found here on the internet.