I like the classic artwork. Very nice.
I see a few things.
Pause and Exit are entirely too close together. You'll end up quitting a game by accident.
Is 'Player 1' button the Coin Up or Player 1 Start? If it is Coin Up, then I don't see a Player 2 Start, which is bad.
Are there 4-way games that require 4 buttons? Or is that for other gaming systems?
From personal experience I would shift your 4-way joy a bit to the left. It is going to get whacked during trackball use.
Just my opinions. Looks like you're well on your way.