Read the notes at http://kinductor.codeplex.com/. You have to push the spacebar to start or reset music playback. You also have to put the midi files in a specific place, or change the location in code. (A bit ugly I know but hey, we had <24 hours to create it from scratch!)
The device is an HP tx2z with a capacitive screen with four touch points (with the March n-trig driver update). HP has a new model, tm2, that replaced the tx2z. I have not tested the tm2 but I assume it is similar or better quality than the tx2z.