Zombie apocalypse

This is just a zombie apocalypse I made up ok Lennie start 3 years after the incident the government thought they finally found the cure for cancer (ik not creative yet) but they were wrong and it created zombies so the president dropped bombs to try and wipe them out but it only made them stronger making mutant Zombie:mutant type Walkers normal zombies slow blind but has really good hearing Runners the first variant of a mutant faster zombies if you shoot their legs they’ll fall Brutes stronger and buffer zombies their weakness is that their really dumb making their moves obvious Screamers well I think you guys know what they do they scream and they crawl on all fours and their scream can reach over 200 db and it alerts any nearby zombies but their really weak and easy to kill Flyers they have wings and can fly their weakness is their wings Rancors like captains have a peg leg but their right arm is a mini cannon that shoot shotgun like bullets little balls that spread and it can also turn into a sniper like weapon thats all I can think of made if I think of more I will add it and also this is going to be apart of a manga I’m thinking of making on WEBTOON so when I can I will Edit: I forgot to add zombies in this can turn in less than 5 seconds