I'm still deep into development of AI Battle Circuit, but I do want to share what's available now to everyone. In AI Battle Circuit, you can create a customizable tank with simple commands to battle other player created tanks. When the game is streaming battles (check the stream schedule at the bottom of the website), you can submit a code which will create a tank with your Twitch username and prepare it for battle.
Here's a brief tutorial on how to create a tank.
To get started, go to Aibattlecircuit.com.