I want to give some feedback after more games. The rules seems pretty straightforward - yet still they offer a nice puzzle to think about. I certainly do like inertial movement and the way the 'Oppenheimer' type weapon is available to both sides - though we possess only a single counter for it.
My initial games are more about learning how to foresee the inertial movement to one side advantage - it is one of those aspects of 'space games' that I think Your postcard captures really nicely :) This is, however, an element that land-based creature like me needs some time to wrap their head around :D
I will write more in coming days.