Flying to different planets space game HELP

Is there is a video tutorial or someone who can tell me how I could make a game where I could fly from Earth to Mars. Also I need to make Space too. How can I make a game where I can fly to Mars from Earth.

I think you might need to add a bit more detail on what you want to do? Is it a simulator? RPG? Shooter? for the art, the asset store is your friend.

For general space game tutorial/stuff, these might help: