Hi,
Congrats on publishing your demo. That in itself is a big first step.
I echo Mara in that right now it’s way too short to give good feedback that can help your story grow into what you want it to be.
I would encourage you to check out these two threads (one of which leads to a discord group):
https://forum.choiceofgames.com/t/beginners-writing-group/90757
Here you will be able to talk to other blooming authors and perhaps get some ideas for the concept of your story.