I don’t usually write reviews but felt like I should to explain why I think this app is not rated very highly (my guess is that people download, play for a short time and then delete the game), and to save you the time of downloading the game.
Gameplay is fun and challenging, but every time you die you are asked to use gems to keep going. This isn’t that unusual for a game and wouldn’t be that bad, except for the fact that there’s no restart button that let’s you quickly go back to the beginning. The buttons that look like restart buttons take you to the app store to purchase other apps. Instead, you are forced to go back to the home screen each time you want to start a new game ... Really unfortunate actually as I would have liked playing the game if it weren’t so frustrating to navigate.