I really like this idea, and you pulled it off very well. The animation is smooth, and the sounds are great. Other than the minor bugs/improvements mentioned in previous comments, I wouldn't change a thing. Great game!
Nice concept, and a well made demo.
I agree with enlarging the buttons. Maybe also make it where your bot has to stand a certain distance from it before it can be activated.
A lot could be done with this idea, and kudos for it. Good luck with making it a full-fledged game.