I put your SCORM in one of our sites and it seems to be working fine for us, I can see the arrows. Can you please tell me which iPad are you using and its iOS version?
Also, can you please check if it works with the latest version of the app, released this week (v3.5.2)?
My App version is 3.5.2
I am on an iPad pro with iOS 11.4.1
Good news and bad news. I created a Moodlecloud site and the SCORM displays nicely. I then backed up and restored the whole course from Moodlecloud to my Moodle production site and it displayed nicely. The original one still doesn't display properly so I will go through and compare all the course and SCORM activity settings. That's the good news.
The bad news is that now I can navigate through the SCORM I have discovered I can't enter text in the text entry boxes in the SCORM package either on Moodlecloud or my production site. Still using the same iPad and have tried both the internal and an external keyboard.
I don't know why it works fine in browser but not in the app :/