Hi,
I would gladly help you in this task, I have used Arduino + Unity in the past so I know it can be kinda tricky to setup.
Relevant Skills and Experience
I have done this 2 times before, in a game called Advert Hero that used custom controllers and in a project that we used ultrasonic detectors for a simple 3 ABC questions game.
Proposed Milestones
$40 CAD - Prototype
$40 CAD - Release Candidate
$42 CAD - Any required fix and final release
Stay tuned, I'm still working on this proposal.