Thanks a lot for giving it a go, especially since physics games aren’t usually your thing 🙏.
Getting used to the physics is definitely tricky and exploding at first is a bit part of the experience, you can think of lunar lander, for example. There is a tutorial screen before the game starts and the missions list can be opened with M while landed on the initial pad. It's all written on the controls list on the bottom of the screen, but I see how that might not have been clear enough on your first try. Your comment gave me the idea to add a tooltip for both M and E for missions and for shop while landed, so that was helpful feedback.
I’ll keep working on making that onboarding smoother. Really appreciate the feedback and the kind wishes!