I played for a bit, and I noticed as the game progresses the invaders seem to cluster together - making it easier to win (less movements between shots). Maybe t

I played for a bit, and I noticed as the game progresses the invaders seem to cluster together - making it easier to win (less movements between shots). Maybe the algorithm makes them all play the same eventually? As a team of invaders they should want to sacrifice more so they get at least some through the barrier.