G30 » Exercises G30

When the user reaches level 15 in the game,
the diamonds from the completed challenges stop being added to the total number of diamonds.

Steps to recreate:
1. Open the game and observe the number of diamonds.
2. Start playing challenges until reaching level 15, while checking the total number of diamonds after every level that is completed.
3. Reach level 15, complete a challenge and observe the number of diamonds.

Expected result:
After completing level 15 and earning diamonds, the total number of diamonds should increase
proportionally according to the diamonds that were earned.

Actual result:
After completing level 15 and earning diamonds, the diamonds are not added to the total number of diamonds.