Any PRs welcome

[elfoxus]

Hi.

I've done this mod lately. It's my first mod so I do not guarantee it will work properly.
Changes and improvements are welcome. I could not find yesterday what is blocking higher game speed changes, however I predict that somewhere some value is stored with sbyte which sets a limit. I couldn't find it.
As it is my first mod I'm not sure if that can be changed with Harmony. Any improvement is welcome.

This might be helpful in further debugging:
https://docs.unity3d.com/Manual/TimeFrameManagement.html