Thank you so much for playing!
At the end of each turn, the player units are drawn towards the center of the screen assuming there's room for them to move. The idea is that the alien queen has some kind of gravitational effect pulling you in, but I agree it didn't really read too well. The enemies attack by pushing you towards the alien queen as well. I really would have liked to better animate their movements/attacks and the drawing in of players at the end of the turn, but I ran out of time!