Milkraft

Unbeknownst to 99.9999% of the population, there is another galaxy that us humans can access via a portal. This galaxy is called Milkraft. The galaxy has many planets on it, including the Pure Milk, Spoiled Milk, and the Overmilk. The only human to ever step foot on any of these planets was the Milkman. This is all about to change. You had left a large container of milk out, and it had turned chunky. You dispose of this milk, but the chunky milk forms a portal shape. You then try to remove it by throwing boiling milk on it, but little did you know, this was exactly how to open the portal to the Pure Milk. Curious, you walk in, and the portal closes behind you. You will have to survive until you can reach your goal to return to the Overworld, but how?