An attract mode would require extra effort that would bring nothing more to the game. I don't plan to implement it for the moment, sorry.
I am just preventing the stationary screen at the beginning being left on for extended hours. :) Maybe not an attract mode, but how about it alternate between the title screen and the high score screen for 15 seconds each? So for the main, have it say "Press Fire Button to Play" or something along those lines, a person presses fire and gets into the normal title menu options, but lets say the person walks away and its still left on that screen for 30 seconds, just have it go back to the main title screen with the "Press Fire Button to Play" and it goes back to the title screen/high scores list infinitely of course until a player presses fire anytime during the main screen or during the showing of the High Score list. Maybe have an Asterisk character border * around the High Score screen that alternates colours? :P
Again, just suggestions. :) Would like to have this game as one of games to be available to play, but don't want the title screen to ghost into the old CRT monitor. ;)