In this Javascript parser game, you play as a blind professor with a guide that shows you around, describing things for you.
This is a great way to establish a parser voice. Furthermore, the setup (you, an archaeology professor, discover a hidden secret area in a museum) is pretty cool.
I did have several troubles, though. The parser seems to be disconnected from the main thread of parser history, and commands like "NORTH" or "N" don't work ("GO NORTH" does, though). Sometimes it didn't accept my commands; to get VERBLIST to work, I'd have to type it twice in a row. Text was often repeated in places it shouldn't be, like discovering an object over and over or coming into a room from another direction. Sometimes you had to hit spacebar to continue and sometimes not, making it easier to stumble over typing.
A lot of these issues can be corrected by testing, but it lists 3 testers and that it had a couple of months of testing, so it might just be a difference of opinion on what polish in a game looks like or maybe the author just hasn't seen the capabilities of most modern parsers. A lot of this is coded from scratch though so that's pretty impressive.