HoYoverse usually compensates players with free banner currency for every hour the servers are down, so remember to check your mailbox for ZZZ Polychrome once 1.7 goes live. HoYoverse’s gacha ...

Uses ThreeJS/WebGL for 3D rendering and either d3-force-3d or ngraph for the underlying physics engine. See also the 2D canvas version, VR version and AR version. And check out the React bindings.