Hi Adam, thanks for allowing me to access your site. The test was entertaining, considering I did Electronics at degree level I scored very badly! LOL
The problem stems (I think) from the way the scorm player is centralised, therefore, depending on your screen resolution, it will vary.
I have mine set at 1024px x 768px and did not see anything strange, yes there was a gap but only minimal, I would say about half of what I can see in the image up-uploaded in your origin opening comment here.
I tested this using 1400px x 1050px and yes, sure enough I was correct. The gap is much bigger.
So, how to fix this?
To be honest I am not sure, as the page it is in now seems to be using the wrong layout. Normally SCORM packages use the popup, and normally that layout has NO BLOCKS, yet there are some side blocks on that page, so I am wondering if changes were made to your theme that changed some of the page layouts in the essential/config.php for popup layout?