A small logic fault: Level 26.
You can stun the first ghost with the bell, but if you wake up the others and pull them there, they aren't stunned.
This means that either the ghosts can only be stunned asleep or their appetite for human flesh is greater than their tolerance for loud screams
Stop whining about rainbow crates not droping often enough! If you let the crate be and use it when you have around 5~6 golden zombies, you can easily kill most humaniod zombies. After returning to the zombieworld, the timer for the next crate IS UP aka it will spawn in less then 10 sec.
And no to "rainbow crates to long to open"! Just hit it few times beforehand and if you feel overwhelmed by the zombies, run to crate, hit two times (cause prehitting is still counting as a hit), Pacman-Time