I made a Sudoku game with a Do-More and C-more touchscreen just to see if it could be done. It can. Most of the work is actually done by the touchscreen. The Do-More is just storing puzzles and copying the active one to a range of V registers that the screen looks at.
I stored them 4 bytes at a time in user defined range of DWords to save space then copy the selected puzzle using SUBSCRIB to copy to a V range as unsigned bytes.
It turned out better than I expected. I was curious if anyone has tried anything similar.