(THIS GAME IS BEST IN FULLSCREEN MODE) Don't let the big invaders get to the bottom! It will go right back to the main menu! Also, try to score as many points as possible by ruthlessly killing tiny aliens >:3 Invaders will occasionally gang up to create hardcore waves. And, very rarely UFOs will do the same. I heard something like "They get really triggered when a player gets 2500 points"...
