figured out what the cage is for. Since you generate 2 ep per 5 seconds, it would be nice if every cage with someone in it would increased the ep generated. I thought at first that the cage would either be a barrier or a trap to remove 1 of the invaders from the playing field. Which could still be nice. A trap that hold 1 invader for a few seconds so other traps have more time to deal damage. Either way, heres an idea, why not have the invaders target the cages to try & free anyone you have locked up. Then the player can set up "mini-cores" to lead the invaders around. Then more complex strategies could be deployed to make some invaders double back through traps. It also adds risk of losing your cash generators if you aren't care full. Just an idea. Sorry if I'm going on about this to much. I'm studying to be a programmer right now so things like this get my brain working.