Ya know. I do voice acting. I can help you out in that department if you need it. ;D
This project looks good enough I'd be happy to donate the time when I can between work. I like what you've built and think it's something worth doing.
Heads up, this is my Youtube Channel: https://www.youtube.com/channel/UCgF3XP1BXNQTqSLUgXNbRWg
I can help on the robot voice as well as other normal stuff. It'll be crisp, clean audio. Not amatuer quality.
Let me know if you're interested.