If I do interface management via LCM, will it count as one button?
If you don't use a common acronym, you should write what you mean fully :p
Do you mean "Left Click Mouse" ? I usually see it as LMB for "Left Mouse Button".
A mouse button is OK as long as it's sufficient to play the game. If you have to move the mouse, it's not OK.
Привет! Да, я имел в виду левую кнопку мыши, я хочу использовать ее для управления интерфейсом игры.
То есть левая кнопка мыши будет управлять игровым процессом и интерфейсом (инвентарем, возможно крафтом и т.д.).
You may have a "main menu" (start game, options, quit...) using the mouse movements.
But once the game has actually started, only one button and no mouse movement!!
That sounds interesting, but without mouse movement menu selection etc. will be a good challenge.