Marketplace is the tenth and final main level of Doorhaven. It tests the player with a large amount of Bulk Keys and Bulk Doors in various colors, challenging the player to open the correct doors and collect the 6 required white keys to win.
Here's a good puzzle to send you off after your stay in Doorhaven! The goal is simple: Bring 6 White Keys to the door! How you manage to do that is for you to figure out. Good luck!
Collect all keys, head to the bottom-right, and open the 2 cyan doors to get a white key.
Open the bottom 6-purple and 2-orange doors and pick up the 2 cyan keys.
Open the purple 6-door on the right and pick up a white key.
Open the top 2-orange, 2-purple, and 1-green doors and pick up a white key.
Go to the left, open the 2-green and 2-cyan doors, and pick up a white key.
Open the top-left 4-orange door and pick up a white key.
Open the middle green door and purple 2-door and pick up a white key.
Take the 6 white keys and open the 6-white door to get to the goal.