The art of this game is very professional, the choose of colors, the UI and even the font used looks like match perfectly with the game. The artefact idea is very cool (artefact, '+-' and the value) and the graphics is awesome!
I always died trying to fly again after landing. So I noticed that I was dying because I checked 'inverted control' and after landing (orthogonally to the ground), I press space to fly again, but the controls are weird, I think it just reset to normal state. So I unchecked 'inverted' and now I can fly properly.
BTW, the effect when you goaway/arrive on the planet is 10/10, well done!