An adventure game that plays like an episode of the series, with the viewpoint character as your sailor of choice (Well, except Jupiter or Mercury, guess they weren't popular enough) It's more a visual novel type set-up, rather than a branching story choice.
The game is controlled with the mouse, selecting from menu options. Run with Disk 1 in the first floppy slot, and Disk 2 in the second, and you shouldn't be asked for any disk prompts.