I bought EarthX about 1 week ago and I love it.
And here is some suggestions that would be awesome if added.
-Make the economy more realistic so make the rockets more expansive and increase the money earned.
-Add more rockets. Some examples, Soyuz, Electron and falcon 1.
-Add a launch cost becuase it's super "OP" to reuse rockets.
-Let the player know why the rocket exploded.(add part durabilty maybe?)
-Make the game longer.
This is things that I would like if added and remember that I'm not an game designer so maybe my ideas suck.