I don't believe that I know enough to give you any helpful feedback on any kind of academic level. In fact, I probably shouldn't be posting this at all. The reason I am is because a few of your words jumped out at me and struck me as not in your best interest. They are: "It is a metaphor. I need to find a way to make the audience understand . . ."
For this writer, all is metaphor and "making an audience understand" seems a bit beyond our capacity as human writers.
For what it is worth,
P.S. Great luck with this. Your play does sound very interesting.