In Temple Diamonds Rush, you have to find and collect special gems to complete your mission. There are a lot of challenges and obstacles, so you have to be careful. You can collect diamonds, rubies, emeralds, etc. 

To get more gems, you can use boosters. These are very useful and help you to get through the harder levels. You can also find special gems. 

The gems are used for various purposes. You can use them to open a treasure chest. You can also find special blocks. These blocks can be opened if you match them with the same number of diamonds. 

Once you finish the level, you will get a score and a level will be unlocked. 

You can also compete with other players. There are different leaderboards and achievements. 

The game is completely free to play.