I've created a very simple balloon popping game like the first example in the Level Zero eBook. Basically I randomly spawn balloons that head to the top of the screen and the player gets points for tapping on them.
At the moment I am increasing the speed and rate of the balloons every X seconds. What's the best way to split this up into different levels so that each is more difficult? Duplicate the layout and event sheet for each level? Make multiple layouts with one event sheet? If there's only one event sheet how do I keep track of what the current level is? Do layouts have variables?