The dark reaches of this Forest world are unknown to mortals. Rumors and fables abound. Most of what is known comes from the tales told of the ancient time when chaos rules. The clue is in a treasure chest.
Level 20
The chest in the bottom left corner contains Death.
Level 21
The bottom left corner exit leads to room 23. The top right leads to room 22.
Level 22
Note the extra attack potion upgrade in the southeast. The box in the top left corner contains poison; save your key.
Level 23
Level 24
Level 25
The bottom exit leads to room 27. The top exit leads to room 26.
Level 26
Level 27
Level 28
Level 29
Level 30
Level 31
Level 32
Level 33
Level 34
Level 35
Level 36
Level 37
Destroy the walls a single shot at a time to avoid accidentally destroying the extra speed potion upgrade, the most important upgrade of all. By the end of this level, you should have all five upgrades (levels 12, 15, 16, 22, and 37). It's best to play 1 player at least up to this point so you don't compete for the extra upgrade potions.