i've been keeping count of the vaults i've created and deleted. i'm about to delete my 20th vault. the most advanced room i've been able to get to before the game starts crashing on load is the agility room. clearly i like the game by the fact that i keep starting over, but it seems like it's getting worse. i deleted 19 after building the medbay and with the minimum number of dwellers for that, and number 20 is even less far along....

Considering that most people can play the game without hitting the same wall as you, it might be your phone. Ever tried checking that angle?

If you want help with a problem, we need details. What phone? OS version? Specs?