Hi,
basically, you will need two actions:
1: use the action "Touch Event" and implement an event for the "Began" phase ( create event in the event tab)
2: have this event as a transition on the state where you have "Touch Event" action
3: on the second state ( coming from your transition event", use the action "loadLevel" or "loadLevelNum" to actually load anothe scene
that's it. So, yes, Study carefully all the screencasts and video on playmaker you can, and then try to apply what I said above.
Bye,
Jean