ADRIFT usually has the weakest of the popular parsers (Inform, TADS, Quest, etc.), and this game is no exception.
The concept is interesting: you play as a human playing a virtual reality video game after the main game has ended. There are several layers of reality, similar to Wreck-it-Ralph. You play in a single layer, though.
The video game is about giant mechas fighting aliens. The after-the-game playthrough that occupies most of Mishmash is a stealth game using a 'ghost cap'.
I enjoyed the opening scenario, but the game quickly devolved into walkthrough-only territory.