1.New boss added.Added a new enemy.
2.Modify the game difficulty of the 4-5 level area.Slow down the enemy support landing speed.
3.Retrivable bot will possiblely appear in 3 level area .
4.Increased Missile and Blot's damage.
5.Modify the boss random generation event, Bosses appearances more average, each game will have different boss for challenge.