Good history, with some quirks
As someone who never played the original, I'm finding this really interesting--it's a great retelling of Mechner's creative process.
While I'm still working my way through this interactive documentary, I've found the playable versions of Mechner's earlier games particularly interesting, and I *love* that I can just sit back and watch an emulated "recording" of someone else playing, while being able to jump in at any time.
There's a few quibbles I have, though:
* There doesn't seem to be any way to show only what you *haven't* yet seen in a particular chapter. I thought I saw everything in the "Deathbounce" chapter, but it says I've only seen 89%, and I have no idea what I missed.
* The UI really seems made for controllers, and everything feels awkward with a keyboard and mouse--kind of like one of those weirdly-ported console game that maps buttons to keys on opposite sides of the keyboard, making it difficult to use with one hand on the keyboard and the other on the mouse. Sometimes there appears to be no way to do things with just a mouse, including exiting the application.
* The game sometimes immediately exits when run from GOG Galaxy (see the GOG forum for this game for more details). From what I can tell, disabling the GOG Overlay appears to have fixed this so far (fingers crossed), but it's still a frustrating bug.