Not even gonna sweat it, but is it possible to have the ability to enter your initials using the Joystick as well? :) This way I don't have to get up from the comfort of the couch each time to enter my initials using the keyboard? :)
Only other hair splitting I can think of is the High Score table. Is it possible to do them for each difficulty? :P If there isn't enough room, maybe have it also list on what difficulty level they set as well as the Ghost/Lives amount they set. Extra stats I know, but this way someone playing on the easiest level doesn't completely crush someone who played on a much harder difficulty. If so, during the attract mode, they can maybe show each difficulty high score table for about 5 seconds each going through each difficulty. Maybe even add a colour cycling border all around the High Score table with a * character? :)
Again, just some final input in case you decide to go in again. We are having a blast playing the game otherwise! Have a good weekend. :)