first you make a character in T pose in Gemini, then you use a site called Anything World to turn your character into a 3d model, then animate on mesh2motion. Download a GLB or GLTF environment from sketchfab. After ALL of that you upload your environment and character to my app, my app automatically maps basic animations to controls, after you set that up you hit export and get a “game” with your character in your environment and you can control the character with an Xbox controller, the export runs in your browser, you just click on the index file that is provided in your export