Hey, this is Gandi IDE - Code, Design and Create Games Together!
Gandi IDE is an in-browser game engine, a mod of MIT Scratch with collaboration features that allow scratchers to design and code together in real-time. Gandi also contains many extensions to help developers make multi-player online games including MMO, MOBA, PvP, and PvE.
You can get more detail on https://getgandi.com/.