He means launching gl4es with the name of the program you actually want to run as an argument to the gl4es program, I assume. Gl4es is a shim that intercepts openGL calls and rewrites them as openGL-es calls.
Yes would work, I allready made it whit the snooker game, I also wanted to make this whit Minetest but I ran into a issue whit the Sound Driver.. so it’s refused to work ..