I might have played a clone as a small child. Or maybe an early revision? I distinctly remember questioning what happens when more than 9 credits are added to t

I might have played a clone as a small child. Or maybe an early revision? I distinctly remember questioning what happens when more than 9 credits are added to the machine. This was because there was only one digit for credits. I found that adding 10 credits only counts as 9. Looking at imagery I am seeing two digits. Incidentally, 9 credits of space invaders ruins the space invaders experience.