The best way I find is to:
Line up with the mark on the outside ledge of the lander
Slowly move forward until it tells you that you can buy the lunar lander
Move backwards fast and press the corresponding button to buy the lunar lander (move backwards first before pressing the button. If it works then sorted, if not it won't have cost you any points)
You should now be off the lunar lander and the railings will be going up
At this point move forward so you hit the railings and you will be in line with a railing that runs vertical
The lunar lander will take off and hopefully awahey you goooooo
This works for me 99% of the time. Sometimes I'm too slow and the lunar lander captures me and takes me away. I'm too fast and when moving back to line up with the rails I get dragged in the lunar lander. Finally the lunar lander decides it doesn't want me to travel so flies off leaving me standing there shaking my fist in the air at it
Hopefully the above makes sense. I only have 1 contact lens in (eye infection) so the screen is a but blurred and I have just woke up