OK i so the file is working fine..
just comment the extra thing, because you dont need it
and change the print2 function to error("...");

(...) the message that is there of course.

And it works good.
But at the moment, GS cant detect multitouch, i mean, the engine that triggers the touch on panels its not implemented, because it sticks to the old single touch methods i think.

So, for multitouch you have to kind of trigger actions based on the multitouch positions, and develop from there.

:S