Opus 5.5 builds a flight simulator in one HTML file

CyrilXBT @cyrilXBTOriginally posted 2026.09.26

Open original on X

i asked opus 5.5 to build a flight simulator over procedural mountains in one html file 321 lines. one prompt. one bug fixed by hand. nothing in this world was modeled. every peak, lake and tree is generated from noise as you fly, so it never runs out bank left and dive toward the snow line. the mountains keep building in front of you follow @cyrilXBT