Supported and looking forward to play. If you made whd-install it could be possible to set NTSC tooltype for correct speed.
The game actually already manages everything internally. If it detects that the machine is running at 60Hz, then the game runs at 60Hz (which is the intended speed). If it detects that the machine is running at 50Hz but can run at 60Hz, then it prompts the user to press the left mouse button to play at 60Hz or the right mouse button to play at 50Hz (in which case the speed is increased by code). For machines that can only run at 50Hz, the game speed is still increased by code to emulate 60Hz.
Or did you mean something else?