Pixel Kerker

					
Unlockable Huntress Character Class:

When you have defeated the the third boss the Huntress character class will become unlocked.
Unlock Challenges Mode:

When you have completed the game Challenge mode will become accessible when you select a hero.
Rat King, Depth 5

In Goo’s main chamber, there is a secret door to the Rat King’s room. It contains lots of chests most with low gold, but some armor and weapons.