We decided on the concept of a scavenger hunt/monster chasing you game set in a library. Currently still in the initial phases but hoping to have at least a basic demo available Soon™
A new team addition is actually good at 3d art stuff and even the first pass concepts he created are pretty amazing.
Unity game engine which uses c# scripting and targeting webgl deployment
Ah and Unity is using WebAssembly for the output for WebGL, very cool.