WASD to move, Q and E to go up and down, and mouse to turn. The "FOV" variable controls the field of view, and "Cube Size" controls the side lengths of the cube. Make sure to press R after changing the size to regenerate the cube! Use TurboWarp if it lags: https://turbowarp.org/716921622?fps=250
This is my first 3D project. It was mostly a test to see if I could actually figure out how to make something 3D, and I think it was a success! You may have noticed the FOV slider has a very large range, and there's an important reason behind this: (scroll down to reveal the answer) it look kinda funny.