Physics aside, great game thats fun to play... and aggravating! lol... and to fraeuleinwunder's comment, its not their radius of vision, they are all already told where to go first on each level, so if the level tells them to go to the farthest boxes first, they are in fact going to ignore the closer ones. 4/5
 "Cargo Bridge"){kind=icon}
 "Super Stacker 2"){kind=icon}