[Speedrunning] Add a frame cap slider & more

[obgcode]

Hi. I'm the admin of the speedrun.com community for this game. A run was just submitted it will take a while to get up.

We have some feature requests. If you could add a speedrunning timer (like a global ground timer) that would be good, and a framerate capper. If the physics are frame dependent, please make a tickrate of 60.

Love this game and would love to turn it into a speedgame.