thanks for the guide/vid! this is indeed probably the best spot on the best level to do this.

i used stewie as well. his tiny hitbox allowed me to be a little more reckless than otherwise with such a tall character like the Q man.
Magma gun is king. spamspamspamspamspam

then i just used his homing ray to shoot the stragglers across the map behind some crate. i only bought those two things . everything else is unreliable or hazardous.

of course after every 10 waves i minimized the game and took a break. watched some family guy on netflix.

easy as pie !
didn't really bother with pick up items. i had a few ruperts and eggs just in case but i never used them.

I tried Quagmire, but found Stewie and his Magma gun to be a bit better, plus with Stewie you get his stachel charge. Also I stood at the top of the stairs and shot straight down into the doors whenever they opened, incinerating everything but the robot chickens on contact.

There is an aid icon right outside the doors on top of the crate. It is advisable to re-start the level if you don't get Joe, Rupert or the chicken egg since those are the most useful items.

I clocked a time of about 75 minutes to complete all 30 levels.