I believe you can find the original out there in the emulation scene (search - I don't have a link). I was a big Apple ][ user and got nostalgic once. I found the emulator and some games. It works the same way as it used to: with Applesoft commands (CATALOG, BRUN, etc...).
It was fun for a little while, but it didn't take long for the magic to be lost. I can't imagine how I would have spent so many hours playing such simple, monochromatic games. I guess that was the state of the art (then).
My how things have changed.