Unfortunately, the game won't stay open.
I see the first picture loading screen, then it crashes.
I am using an IPad Air, if that helps.
Oh dear. I know of one or two cases of the game sticking at the loading screen when someone had an iPad configured to use a non-Roman alphabet, and it helped for them to change their region profile to "UK" or "Europe" long enough for the game to load the first time (after which it was fine to go back). In that case, the game didn't close abruptly, though -- it just stayed on that initial picture page.
If it's actually closing again abruptly, then the main thing I can think of is that possibly your iPad is very close to being full?