TypeRacer.com is a website where you compete with others in typing tests. Due to the inherent trust in the client that is required for a typing game, the game is a big target for people trying to cheat and so there are some anti-cheat mechanisms in place (e.g. a timed captcha).
For fun, I developed an exploit chain with JavaScript that bypasses the anti-cheat to reach the maximum speed. I wrote up my experience in this GitHub repo. The exploit probably doesn't work anymore, but that was never really the point.
If you are interested in knowing how I did it, check out the write-up.
If you just want results, refer to the screenshot below.