0.5: Starship launched!

I have recently started in an incubator to focus more on my game, and it has been amazing! When Starship launched today, I had to celebrate somehow, and so the Starship model made it to the game. On top of that:

- I have tweaked the parameters of the rocket to make it more difficult, with the neat affordance that there is more to play for

- The camera is undergoing some changes

- Implemented a trading system. Buy your cheese on Earth!