HN user
I work on the game. Really happy to hear you like what we have done, and sorry to disappoint. We have moved from WebGL to Unity and are currently porting our demo.
Send us an email at hello@corsair-game.net if you want to help test our Linux releases!
We will charge for the game, yes. We are building the game with the Unity Engine, and that allows us to release on practically any platform we want. Currently we are aiming for a standalone PC/Mac/Linux release, but mobile is of course also interesting. First things first, though.
We are considering selling the game on Steam, but have not decided yet.
I'm another guy working on the game.
Whoa, thanks for the attention! Left the computer here and came back after an hour to see quite a few new email signups... Didn't really know what to expect, but this was a positive surprise!
Anyway, regarding the similarities with Space Engineers, it is understandable, as both are kind of first person space games. To be honest, it has been a while since I looked at their game, but I believe our vision is different. We have more of a back story, more gameplay (not just a sandbox), living ecosystems, NPCs, missions, etc. Ship building is a core part, where you build and improve your ship and crew to be able to travel further and explore more.
The demo we have on our site is a bit dated concept version we built with WebGL (Three.js and Cannon.js). We have recently moved to Unity and are working on an intro/tutorial that will be our new downloadable demo. ETA of that is few weeks from now at least.