First, welcome to the forums Jack. Second, did you try rebooting your device? If and when so and it still hasn't resolved the issue, to assist the publisher and developer further:
a) what device you are running; and
b) what is your game build number? (Click on the 'two-gear' icon along the centre-right of your game screen. Click the "Customer Service" button, and look for the data that appears after "Build".)
I am using an ipad air and iphone 4s and just of today, the game does not load past the loading screen, it simply crashes after 25%. Tried everything, rebooting, reinstalling, none of the two aforementioned devices can load the game.