So, in my game, "Psi," I am wanting to randomly spawn enemies just past the edge of the layout on a layer with parallax set to 0 so they won't waste processing power by being in the layout from the beginning. Does this sound like a good idea. Can anyone explain exactly how I'd do this? Thank you.
Here's a demonstration pic of what the layout will look like:
<img src="https://dl.dropboxusercontent.com/u/60595907/Psi%20screen%201.jpg" border="0" />