WARNING. This website it's a fan-made RetroArch emulator that have real RetroArch emulation JS. This website renders the emulation little bit slow and the screen separated to three colors. R, G, B. Mixing it becames normal color. You can't emulate Xbox games, Wii games and Windows/Linux/Android/MacOS/IOS games on this website. You need some emulators to emulate these on website or app. If the emulator it's not working, reload the website or reactivate WebGL (I guess).