I don't know if this is the official answer but if you've ever played DOOM and pressed Esc then you'll feel right at home using btop!

         DOOM
         ====
     :) NEW GAME
        OPTIONS
        LOAD GAME
        SAVE GAME
        QUIT

Compare with:

         BTOP++
         ====       v1.3.2
     -> OPTIONS
         HELP
         QUIT

Apart from that, there are not other gaming mechanics.