While Mouth of Ashes doesn't contain major bugs (because there is little room for them) or spelling errors (because it's short), these are the only things it gets right. It is a example of everything that could go wrong in a game.
It focuses on creating a world, without making understanding it a puzzle. It inconviniences the reader by putting everything examinable behind a link, instead of letting him skim at his will. There is no interacivity, but there are choices without effect. It is static fiction, and it doesn't want to be played.
The initial version didn't include the pictures as part of the download, the lack of which was my least important complaint. The structural issues are still a fundabental flaw, which make any merit from the story moot.
This is the first time I've seen to run slowly in a modern interpreter. Given that it's in I7, and not I6 or TADS it's probably due to the game's programming. It would have been pointless to use I7 and remove almost the entire library, so I'm guessing he left the whole thing in.