Thanks for the feeback. It's better to leave it on the game page =)
I played your game. It looks good. Playable. Love the mission selection icons and ship models.
Some things I'd change:
1) Remove system mouse always visible
2) Make the movement without clicking
3) Give a rotating animation to the ship during moving only. It looks weird when it always swings even not moving
4) Move the "select mission" button above others buttons. Intuitevily and commonly the quit btn stays in the bottom of the menu
5) Stop play when not in the window. I think it calls "play on background" when you build in Unity (I don't know what engine you use but it gotta have a similar feature)
6) Not a big but catshes the eye - rocks background blur. It's weird because camera can't focus on the front plan then unfocus middle plan and then focus again far plan(sky and stars)