I like the vibe I got from reading through this project description. The constant threat of being shot at sounds like it would make for an unnerving gaming experience.
Since you're talking about the sniper triggering traps I wonder if you do plan to base this engine on physics. Could certainly spice up things I imagine.
You are Mr. Duncan, the father of a single child, Duncan Jr., who you, by instinct and self-defense, accidentally used him as a human shield for a bullet that was intended for you
That was kind of a LOL moment for me tbh. How do you accidentally use somebody as human shield, let alone your very own son? Wouldn't it be more intriguing if he just got accidently in the line of fire?
Other than that I have to say I particularly like the idea of being able to use NPCs as shields. I still wonder how that would actually be included in the gameplay.
That's my thoughts for now. Hopefully there will be some media from the game soon. Good luck with this project!