G29 » Exercises G29

At level 15, diamonds earned from completed challenges are not correctly added to the total diamond count

Steps to reproduce:
1. Run the game on mobile device
2. Play the game and reach level 15
3. Complete challenges and note the number of diamonds earned

Expected result:
Diamonds earned from completing challenges at level 15 should be correctly added to the total diamond count

Actual result:
Diamonds earned from completed challenges at level 15 are not added to the total count