This is a good example of Ditko's science fiction work of the era (and with some obvious similarities to SHADE, which he was likely still working on or had just wrapped up when he did this). Not a lot of time available for characterization or explanations, some interesting twists and some great artwork (which is reproduced much better here than in his colour work at this time). Check out some of the detail in those panels, the ships in the space armada, the feeling of depth in the last two panels. Really prime Ditko stuff.
Ditko's work appeared in the first five issues of QUESTAR, including the "Cosage" story in #1.