Have a setting, that instead of making the plays suggests the plays the bot would make, so the user can play himself take them under advisement, but still make his own decisions.
This would let you correct the mistakes inevitably a bot will make, like I just played a game where it used the coin for no reason, if it suggested that, I would not do it.
:)
All in all great work, great bot! This would be a great feature though!