Some small things that i noticed while i was playing it,

1: sometimes when you press "N" to exit starcatch, it starts again anyway.
2: if you replay ping pang pong without going back to the main menu the "scr: (number here)" message will be large font.

They dont really affect gameplay so it's not a big deal.

Great job on this! Could you explain to me how you did Swap? I've been sitting here wondering since the first time i tried it.

But how do you save the buffers? Do you save one to a Picture variable first?

By the way, does turbo mode work an 83+ BE?

mrr... those are both things i have fixed in the version on my calc, but i had an only slightly older version on the computron already and transferring a new copy would have taken forever. i went through the code and tried to update everything instead, but i guess i just missed those two things. 

and swap! is really simple. it draws to both buffers, choosing which one to put holes in at random, and then swaps them

Exch()?

I think turbo mode simply sets the calc in 15 MHz mode. It might be cool if not done already if you made the game so turbo mode cannot be selected on the regular 83+, else you may end up getting questions about what is the difference between normal and turbo