This game is extremely fun and addictive. I like that I can play this game for hours without having to wait for anything to reload. I would give this game a 5 star but I can't get past Factorium. I have been in all the places in the planet and collected all the shields but when I went to turn them in for the next portal only 3 went to the portal and the other ones disappeared and when I go back to where I got them, they are gone. Without the shields I can't continue. Very disappointed.