I wrote a knockoff of Atari2600 ‘Adventure’ in Turbo Pascal on the Tandy 4000.
I still have the .PAS and .TPU files.

It would mean the world to me if someone would suggest the right emulator/package/anything that would let me run that old childhood treasure and share it with my children

Turbo Pascal will always hold a special place for me. One of the very first languages I learned, the very first compiler I bought, and the first games I ever wrote. Good memories. Sadly I don’t think i have any of the source any more. Lost it all in the great crash of 99.