For anyone (like myself) that doesn't yet know what to do, just shoot whatever thoughts you have in this thread.

For example: Maybe a tower defense but the towers are satellites and the base is the moon?

Honestly the first thing i thought of was a quote I heard a long time ago. 

"Aim for the stars and you may hit the Moon"

The way I interpret it is to set your aspirations high, expecting not to reach them fully, for what you achieve will be great.