https://experiments.turbowarp.org/pointerlock/1384316685?hqpen&size=640x360 - use for moving your camera with your mouse and a bigger screen. Move - up/down arrow or W A S D. Look - left/right arrow. Turbowarp - You can look useing your mouse by clicking and then moving your mouse. Press ESC to unlock your mouse. Press space or click the gear at the bottom left corner to open settings.
Most work goes to @griffpatch for the tutorial.