Tap the numbers from 1 in order.
There are 5 levels in normal and 4 levels in colored.
You can also change game-size in custom mode.
At the first, you can choose only VERY EASY.
The other modes will be released when you has cleared some CHALLENGES.
You can unlock "EASY" more easily.
Challenge friends and check leaderboards and achievements.
With Family Sharing set up, up to six family members can use this app.