Exercises G26

After reaching level 17, the game won't alow the player to play the second challange

Steps:
1.Lunch the game
2.Play the game
3.Finish the first challange after level 17
4.Choose the second challange

Expected Results:
After reaching level 17, the player should be able to select a new challenge

Actual Result:
After reaching level 17, the player is unable to select a new challenge.