Both the leaderboard system and all the games were developed in HYPE. The website was PHP and MySQL. So data from the games was stored in a database and then leaderboard data was fed from the database back to HYPE. The video below shows a quick overview.
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Amazing! 
Beside the games and the track of score - as I see there are over amazing - did you integrated in a known LMS? Or you just created your own system?
I work to achieve this using a headless CMS. But I am at the beginning.
Congratulations, again!
Sorry for the delay in responding. We make our courses SCORM compatible by integrating the Tin Can API. So it can plug into any Scorm compatible LMS.
Thank you!
Impressive work!