How do I unlock all the secret characters in You Must Build A Boat?
- Catapult - Unlocked in Woodward's library after unlocking enough monsters.
- Ninja - Hides in the scenery next to your boat in the Pagoda map.
- Wraith - Kill a wraith in the Vault map with a Fireball spell.
- Black Dragon - Watch the paintings in the Gallery map, and tap the one that's a painting of a Black Dragon.
- Geltower - Eat food while fighting a Geltower inside the Mage map (the big fluffy cube)
- Robber - Tap your character repeatedly, making him hop at least 5 times just after you hop out of bed.
- Skeleton King - Sell enough items to Saundi's Broking, at least 50+. I'm guessing it's "every type of item" but I haven't been able to corroborate that.