I made a full html5 game that was an anonymous survey collection platform, it was meant as a solution for 2 problems: toxic work environments and gamifying boring processes the whole project was a gamification of business process to make it more engaging and add context, might not seem cutting edge but the devil is in the details i had to do lots of libraries and tools to make sure it is not exploited.
As for the startup the ceo fucked us all up and we ended disbanding, my only regret is that we actually had a revolutionary idea going on.