Idk what all the custom perks do but Ik some here are a few
Banana Coolada- When U Slide you leave a banana trail that makes zombies slip and fall
Ice Bull Blast- Allows you to double jump press c in midair to do a slam attack on the ground which will freeze nearby zombies
Madgaz Moonshine- Allows you to slide kick zombies when u slide you release a huge explosion you have certain amount of uses use it wisely
Crusader's Ale- Double or triple melee damage not and more points for kills can be stacked with the double points powerup
That's All I know

Lol I haven't played the map but I was credited in it and there's a bunch of custom perks so maybe mine are in it? The download and description of all the perks are here: https://forum.modme.co/threads/community-perk-pack-custom-perks-by-the-community-for-the-community.2622/

I know that Snails Slurpee is there for sure from your perks!