I had try the windows 64&32 bit version and i had the same issue (game was launched in a windows but ALT+ENTER made the game in full screen).
Mouse work in the menu but WASD and mouse control didn't work in game.
I did just fire,slow down, and crouch.
Otherway the game consume a lot of memory and processor and need more optimisation on unity engine (but it wasn't laggy on my gamer laptop).