Really like the idea ! The fact that you deplete keys you already used is a great bug feature, it add weight to the choices !
Viewing post in Binding of Keys jam comments
of all of the bugs in this game, it is actually intentional that depleted keys cannot be used again, it was supposed to force interesting bind layouts, where you would fight with your own instincts of WASD and arrow keys, in the end, some of the keys just dont work on web so that kind of fell apart, glad you liked it though!