[gitgud]

Nice, a bit too fast on my machine though. It should probably use a time-based interval, rather than updating every frame.

[dannyw]

It actually uses a time-based interval and tries to move every 5ms. At this resolution, different browsers will handle it differently.

Most web displays run at 60 Hz (16.66ms), making it inefficient to update every 5ms. 144Hz displays do exist and are wonderful, but you should always use requestAnimationFrame anyway.