Hello there. Yes that is what game jams are about. using your mind to make the game that you know fit into the theme. As it says, theme is open to interpretation. Area 51 exists but there are conspiracies of what happens there. So this is an advantage for you, You can make the game without considering if the true story is not being considered or the changes are too major to apply. You can always link true events that you are sure about happened and are not just a conspiracy. I hope this answers your question.