I can see where you picked up a lot of your inspiration from. Not a bad choice.
I had trouble finding the 2nd digit of the code to the phone. I ended up brute forcing it after finding the other 3 with no trouble.
You mentioned needing funding for art, and I wholly understand the issue. This might sound a little controversial, but this is a case where I will say "AI images are fine to use". Especially if you plan to replace it later with proper art. If you still won't, no worries. I'm only putting it out there as a means to have a placeholder for certain scenes. At least until you can get the good stuff.
Part of me wants to suggest mechanics but... I know I should hold off on them.
I sincerely hope you can get some breathing room for game development soon. Maybe find other ways around certain issues that will help expedite overall development without really increasing costs.