Keys earned

[nononanette56]

Ive earned many keys by completing challenges. How do i use the keys to unlock levels?

[Phaedrakiki]

Hi nononanette, the keys from challenges earn you coins, gold, energy, etc. (varies.) They're automatically given to you after so many keys. To unlock levels, you have to earn an average of 2 stars on all the levels before it. For ex., to continue to level 61, you'd need a total of 120 stars from previous levels (60 * 2.) The game will usually tell you if you need more stars to continue...