If you receive an error message when entering a code, it is usually due to one of three common issues:
Use merrychristmas for 1,000 Snowflakes or update6 for 1,000 Gems.
Completing quests is the most reliable way to recover mana quickly and upgrade your bow/towers. Active Communities for New Codes
, which are used to move your progress between devices rather than unlocking free items. 💎 How to Get Free Resources (2019 Style)
: Look for the button labeled Gift Code or Promo Code in the settings menu.