This is NOT 1 shot, we did a few iterations. But Claude made every assets itself. I used a variant of Matt Shumer's prompt and then did 2-3 iterations to fix some issues. Claude first did a scene at dawn, but in its tests it accidentally did a moonlight scene and i liked it better.
My plan is to try and turn this into some sort of shooter game, but i wanted to share because i am blown away by this level of graphics being made from scratch. It did not even take that long, i'd estimate 3 hours total on UltraCode.
Its "world" folder is more than 944kb of javascript to describe this world...