i have 2 gameobject that you need to touch.
you have to touch them very fast after or at the same time but if your finger is still on the first gameobject it doesn’t detect the click on the second.
i currenty use the code.
function OnMouseDown(){
}
The OnMouseDown() function is equivalent to a single one finger tap. As you are trying to accomplish touch gesture you should definitely look at the Input.GetTouch function. This function can track multiple fingers by there ID and allows you to check whether it was a single or double tap.