[MX] Mac Users - key code value for 'Ctrl'

Mac Users of the World help me please.

I dont have a mac to test this out on. I am making a game that uses the Ctrl key. If I were to play this game on a mac would it simply not work.

If anyone has any ideas I would be most appreciative.

If not does anyone know the ascii key code value for the apple key
:puzzle:

cheers