Use the "arrow keys" or "ws" and then the right and left arrow keys to rotate" to move around the 3d maze. RES changes resolution, so less RES makes things more uniform and more RES makes things appear less uniform. FOV changes your field of view so a smaller FOV makes you be able to see less around you and more makes you have a wider range of vision. Personally, I find it easier to just use the arrow keys but do whatever works for you.
Thanks to @griffpatch for his raycasting tutorials. Please Like and/or Favorite. Feel free to remix if you already understand how raycasting works. If you want to make the "level" sprite look different, you can rearrange or add new areas. Disclaimer: FOV also makes things look squashed so when I add enemy sprites you can use that for a challenge. As of 8/6/2024, If you scroll to the bottom and see this within 2024-2025, comment "Wendolyn Pangolin" and I will follow your account and like and favorite your projects.