Hey there! I decided to give your most recent build a shot and it is clear you have put in a lot of work so far :). Here is some constructive criticism, try using some different background music, if you need music which will still fit the theme of ethical challenges you could check out some of the music here:
https://incompetech.com/music/royalty-free/music.html
I would highly recommend changing the way your player shoots as right now it feels very stiff. I am currently making a top-down shooter myself so if you need a hand with that kind of thing let me know. I can not tell what engine you use but if it is Godot here is a great top-down shooter tutorial:
Your game would feel a lot better if your character looked/shot towards the players cursor. 30 levels is just too long for presentation purposes so make sure that you have something figured out for that. Hope this helps :]