Raycasting in JS

    | Keyboard key      | Action
    |:------------------|:-----------------
    | `W`               | Move forward
    | `A`               | Strafe to the left
    | `S`               | Move backward
    | `D`               | Strafe to the right
    | `ArrowLeft`       | Rotate to the left
    | `ArrowRight`      | Rotate to the right