Hey there,
first of all: I am not really into physic based games but I wanted to try out your game :)
I tried it but I actually don't get it. I've died a couple dozen times and couldn't figure out what to do and how to not die within seconds. Neither in casual nor in normal mode I could see a mission.
Maybe it would help lost players like me to have a little (optional) introduction where you show how to basically handle the spaceship to get from A to B without wrecking into the surface or exploding from heat.
Wish you all the best for your project!