Thank you for playing. Glad you liked it. During the stream you were wondering how the game was drawn. Essentially the entire game is drawn using a raymarching technique called sphere tracing. All the geometry in the room is represented as a signed distance field (SDF); a sort of function which tells the distance between a point and a surface. This function is then repeated infinitely and flipped after each room length to mirror the other rooms. Here is a fantastic article on the subject if you want to know more https://iquilezles.org/articles/sdfrepetition/.