Align all gems at top of each gear by turning gears. Aligned gems will shine green.

1000 regular levels to play sequentially and a billion challenge levels which you can play against your friends by typing the level number.

There is a leaderboard for each level so it is easy for a group of people to have a leaderboard for themselves and organise leagues and competitions with no interference from other people.

Challenges 100,000 to 110,000 are the easy challenges which can be solved in 10 seconds. 110,000 to 120,000 are slightly harder and 120,000 to 130,000 are challenging. The rest are randomly challenging but in many cases harder than the 30 thousand range mentioned here.