A very interesting subject.
until 2013 the university of madrid developed a software called e-adventure (you can see here the site: http://e-adventure.e-ucm.es/) and allowed the integration of scorm with adventure games with java engine.
At the moment there is no software that integrates adventures with learning evaluation. the fact that an adventure game built in unity can be integrated into moodle or docebo with scorm is a really interesting novelty.
How does this zip file look like: it contains the webgl files and is loaded as a scorm package inside the lms?
And how is the learning interface created? I'm an expert in e-learning and virtual reality, putting the two fields together seems like a dream... I'm available to discuss this topic further...