Please try the following:

1. Backup your progress via Dropbox. 
2. Delete Syntorial off your iPad.
3. Reinstall Syntorial from the App Store
4. Open Syntorial, and Log In via the Menu at the top left.
5. After you log in, Syntorial will ask "Can we collect usage information?". SAY NO.

If you still experience a crash after completing the above steps, or can't complete any of the above steps, contact us by Submitting a Request at the top of this page.