I know it's really not a game, and more of a webcomic, but it reads like you're playing a Point/Click - Text Command game. Problem Sleuth itself finished about a month ago or so, and now the creator is working on a new "game" called Homestuck.
What's unique about the comic is that 90% of it is reader-input commands, so not even the author knows where its going.
Anyways, here's Problem Sleuth.