3D Obby Game Builder

One prompt that builds a complete 3D obstacle-course ("obby") game in a single HTML file with three.js, with a new twist: every fall grows a smiling cushion at the missed edge, so beginners always progress and experts chase clean 3-star runs. 3 worlds of 10 stages on floating islands, a dozen obstacle types, double jump, coins, hidden gems, ghosts, a daily course, a wardrobe, achievements, touch, gamepad and keyboard controls, attract mode and a demo switch.