Early on in the game, Letter Upgrades and Letter Powers are introduced. With Upgraded Letters your progress will be sped up significantly and by choosing which power you want to upgrade, you can adjust the game to your play style!
 
Here's a breakdown of the Letter Upgrade process:
 
  1. Gain Letter XPby making words
    Each time a letter is used in a word - this can be a word used to fill a puzzle or a bonus word - it will gain 1 XP. Letter XP can also be found in Chests and as Daily Deals in the Shop.
     
  2. Upgrade a letter once it reaches enough Letter XP   
    Upgrading a letter requires a certain amount of Letter XP. The higher the upgrade, the more Letter XP is required. 

    Different Letters require different amounts of letter XP. For Instance, your first Letter A upgrade will require 10 XP to level up, but your first Letter B upgrade will require 5 XP to upgrade. 

    Once a letter can be upgraded, it requires Coins to upgrade. Like with Letter XP, the higher the upgrade, the more Coins are required. 
     
  3. Upgrade to match your play style!
    Each letter upgrade adds a significant amount of progress. You can customize your upgrade by upgrading them all, or be very specific and adjust the upgrade to your play style! The power is yours!