To earn Enigma Coins, the player must do any of the following.
- Collect the small money piles in Nightmare Stages.
- Get a high score.
- Have a high safety bonus upon completion of the tower.
Once the player has enough, they can use the Enigma Coins they collected to buy items from the Merchant Sheep.
Enigma Coins carry on through playthroughs, so the player does not need to worry about losing all their money for early bonus items and extra lives.