Early Prototype: Post-Apocalyptic Survival Game

I want to see a hands-on slice of gameplay before anything else, so the job is to build a self-contained, small area that already feels dangerous and rewarding to explore. Picture a ruined, toxic Earth-like zone dotted with crumbling structures, thick dust clouds, and roaming, zombie-style mutants... (Budget: $20000 - $50000 USD, Jobs: 3D Game Art, 3D Modelling, Game AI Programming, Game Design, Game Development, Gameplay Programming, Unity, Unreal Engine)