Up/W and Down/S to move forward and back, Left and Right to turn, and A and D to sidestep. Walk around the red pillar and see how the different rooms connect in an impossible way.
This uses a simple raycasting technique to render a non-euclidean world (in a nutshell, a space that couldn't actually fit in normal geometry). This is inspired by a project by @griffpatch (https://scratch.mit.edu/projects/411192040), as well as a video I saw on youtube. Check out that project if you want an example of non-euclidean geometry that's a bit easier to understand.
