Unity3D Gesture based game

Hi there, We have a very small project we wish done, more of a tech demo for a client, a simple, gesture-based game in Unity3D. The game will be a 2D game (although 3D in 2D view will be fine), where the user, in rythm to some audio cue's will have to draw a gesture on the screen. The queues could be to copy a shape, swipe, tap or also blow into the microphone (so just detect noise increase on mic). There will be a constant background track which will need tempo increased as time goes on, and every X seconds the audio cue plays over the soundtrack to let user know which gesture to perform.