Regarding Pecking Order bonus:
In certain levels, chickens (and other enemies) appear organized in groups. This bonus is awarded whenever the chickens in each group are destroyed in the same order they appeared on the screen.
This doesn’t apply correctly on “Security Droid Patrol” in which the bonus is applied even if I didn’t destroy them in order, even missing some of them. Waves like “Technological Advances” and “Armored Division” doesn’t have this bug.
PS. I mentioned this on Update 11.
Wave types of Retro missions should be filtered according to difficulty type. Beginner Loop on lower difficulty percentages and Advanced Loop on higher difficulty percentages.