Now lets say you buy a game, have this device and run it.
If you need 2 hours of practise just to not walk in rapid cycles the game will not be
much of fun.
It is simply not a gamedivice that the user can directly use on purpose,
it will rather create a lot! of noise and maybe with some training
a simple usable patter for game-controll. (like siting, and then give the order to not sit)
Humans are able to / designed to controll Fingers, hand, feet, mouth and eyes (and other movable parts)
but not to alter crude brainwaves for some purpose.
This device is not recording single neurons after all.
I doubt that this is more than some toy for technics-freaks.