Instruction artwork

All 80s arcade machines had game instructions typically either on the control panel or on the screen bezel. A later project is that I'm going to modify the Mine Storm software so that it can  be coin operated. When I have success I am thinking  there that there will be a small sticker with instructions placed on the left hand bottom conrner of the screen bezel for the cabinet. Here's a screen dump of the artwork I am considering having made up as a sticker. Of course it also means that some way is need to identify the button number - either numbers printed on the buttons or numbers printed on the control panel artwork. Still very much work in progress at the moment: