Sliders to move around, Space and Z to move yourself up and down. Walk around while watching the cube. Spoiler: Gonna make 3D Minecraft out of this ;)
I wanted to know how to make 3D without ray casting or those clone things, so I watched other 3D games like Crystal Seeker. If you don’t know what Crystal Seeker is, control-c and control-v this URL: https://turbowarp.org/463553665hqpen&size=640:360&fps=60