I started playing this game about 3 years ago. When the app needed updating I was angry to see all my progress had been lost when the update was complete (after completing over 500 levels). I started again as I did like the game. The last month has been a nightmare. Everytime I try to watch an ad, the game crashes and the only way to sort this is to take my battery out of my phone and restart it. It's not an issue with my device as 3 friends have had the same issue and they have different phones