• 1. Pause the game.
  
  
• 2. Use arrow keys (not WASD).
  
  
• 3. Press the Keys In the right order.
  
  
• 4. Continue the game.

Cheat Code: Right Left Right Left Down Down Up Up Up Down Up Up Down Down

Short Cheat: R,L,R,L,D,D,U,U,U,D,U,U,D,D

Cheat Code: Left Left Right Right Up Down Down Up Up Down

Short Cheat: L,L,R,R,U,D,D,U,U,D

Cheat Code: Up Down Up Down Left Right Left Right Up Down Up Down

Short Cheat: U,D,U,D,L,R,L,R,U,D,U,D

Chest Code: Up Up Down Down Left Right Left Right Up Down Up Down

Short Cheat: U,U,D,D,L,R,L,R,U,D,U,D

The Stone Axe can be found in the alleyway after you encounter the first vertical chain. It's obtained by breaking the crates in the alleyway.