Could have sworn we had a thread about this but I can't find it, Any how Looks like the game had some work done on it and according to RPS http://www.rockpapershotgun.com/2014/11/20/space-heat-signature-game/#more-251007 you can sign up for testing.
This is really starting to look quite nice. I look forward to following the rest of its development.
Some more details about the game on RPS http://www.rockpapershotgun.com/2015/07/24/heat-signature-interview/
It may seem small at first but there looks to be a ton of gameplay here, and its great to hear the dev laugh and have fun playing their game because it shows pride and dedication that will make this game great when its done.
Not had a chance to look at this myself yet but I'm guessing some sort of change in direction for the game?.
The game has a steam page. http://store.steampowered.com/app/268130
Great to see this out, have bought a copy and had a quick play around with it has got a bit of a fiddly control with the mouse might be better with a joypad will have to look and see if you can use one.