7390
I found an interesting...shall we call it a feature of the game.
In the above screen capture I was trying to get all the Japanese characters but was too slow before the first shot took out the first one. So I let the attract screen do its thing until it came around again.
huh the player one score increased...so I let it run for a bit and it just keeps going, I assume it would go until it clocks itself at 99,999, however I got bored and canned it after about 4 or 5 rotations...but weird hey.
also want to note that the Hi score does not update until after leaving the "PLAYER 1 - GAME OVER" screen, so not questioning anyone's score, I just thought it was a peculiarity of the game worth sharing.