Nice concept ! I was a little bit lost at times, knowing wich zombies i was controlling or not (can they escape your control?) But anyway smooth game !
Thanks! How it works is the more zombies you have, the greater the range they have to run after a human. e.g. when you have 3 zombies they are likely to attack exactly who you want, but when you have 10 or 20 they often run off by themselves chasing after the humans.