Re:Geeze (Score 1)

If you look at the comments from the same page, below the blog post you can answer the question.

MrSid: ...Thanks for creating an awesome game. I've spent most of the last 2.5 years digging through your work, dissecting it and putting it back together in different form. It was a huge pleasure working on making the kid run and jump again...

Jordan: I'm amazed and humbled by the amount of work this must have taken. Did you actually work from the disassembled Apple II 6502 object code? Because the Apple II source code is lost, as far as I know... at least I've never been able to find a copy.