I've noticed that the Windows player hasn't yet been made to work with multitouch events. It would be great if this could be done so that Windows touch screen users don't have to use devices to test multitouch apps.
There are two issues with the current implementation too.
1) All touches are registered as id = 2 on the win32 player, whereas the count starts from id = 1 on Android and increments with each additional touch. This means that even testing single touches in a multitouch app is incompatible.
2) The Windows player crashes when a 5th simultaneous touch is registered with this error:
"attempt to index a function value
(no more info after colon). This example reproduces...
local function onTouchBegin(event)
print("onTouchBegin. touch.id = " .. event.touch.id)
stage:addEventListener(Event.ENTER_FRAME, function() end, nil)