Alien Station

For 2 minutes you need to protect the "Alien Station" from several enemies. When you press "c" key you change the world for another, you can do it the times that you want or you need. Not only changes the world, also the enemies, change to red when they belong to another world then you can see them but you can not damage them, only when they are green you can finish them, but be careful if they touch you will lose life.