When you open the game, you’ll see a list of the types of puzzle you can play. Some of these are unlocked by completing others.

When you select the mode you want to play, you’ll then see the map. Each square is a puzzle.

 
Completed puzzle - tapping this icon allows you to view the answers or play the puzzle again.

In Progress puzzle - tap to continue playing.
 
Unlocked puzzle - a puzzle that has been unlocked but not yet attempted.

Locked puzzle - must be unlocked (using tokens) before play.

At any time, you can access the Pause Menu by tapping the gear icon (⚙️) at the top right of the playing screen. From here you can modify the game's settings, access the store, view various playing stats, and return to the Main Menu to select a different playing mode.