12,800
Using the Roller Controller. Much easier to get more precise hits with it. It's a shame that it doesn't actually function in analog/Roller mode. Only the Joystick setting will function.
What I'd like to know is how difficult it is to find retro computer systems there such as: FM-7, Sord M5, Sharp X-1, MZ series, X68000, NEC PC-8001/9001, etc and how affordable are they?