If your game started up just fine yet you are not able to get past the first "Linking" screen, be sure that you are waiting a good 30 - 45 seconds before determining that there is an issue.  Myst Island is a huge Age and it takes a while for it to load.  The actual load time will vary between iPad generation and setup.

 If you are still hung on this screen after waiting the recommended time or if realMyst closes unexpectedly, please submit a support ticket or email support at support@cyan.com.