Cool! I'm glad someone except me has patience to beat the AI. AI is simple but defeating it needs a little practice, congratz! I've recorded my 5:0 AI defeat (I know how it works + I gained some skills during testing :) Check it out
My strategy is to shot a bullet clockwise near him to deplete his shields and after he's without a shield I shoot multiple bullets counter-clockwise.
Anyway, playing with human is much more fun, try it if you can :).