How do I get off of the moon?

First get into the x-naut fortress by blowing up a rock with a crack in it on the moon. The rock you need to blow up with have a blue tunnel in the background. Once in the fortress find the elevator key by going through the door at the end of the hall. Next go to sublevel 2. On the left there are 3 doors, I'm pretty sure the second door is the one you want, there is a teleporter in that room and a red button on the back wall, push the button and step into the teleporter. It will take you to underground rouge port

Its easey on sub leval one or 2 and theres a teleporter once your done on the moon and you take it it wont work to go back to the moon