Sounds like voice recognition where your 'voice' is blowing into the mic.
One way I can imagine doing it is using a sensitive sliver of metal and use its relative displacement to move an object.
Also you can connect a mouse to a phone so that's a good starting point. It would have to be a super sensitive tiny Tiny mouse on a near frictionless surface to get some movement though. I imagine you would put a sail on it just like ancient ships...