Isometric Bullet Hell RTS Demo

I'm looking for someone familiar with Unity or another 3D game engine to create quick mock-ups of game mechanics. I am still experimenting with ideas for a game but I want to play test a simplified version of the core game mechanics to make sure the concept works... (Budget: $8 - $15 USD, Jobs: 2D Animation, 2D Game Art, AI Development, Game Design, Game Development, Game Testing, Prototyping, RPG Development, Unity)