Compliments will be flung as well, and if they reach the innocent critters, their happiness level will rise. This also causes them to thank the critter, thereby turning them kind ("They appreciated my compliment?"), which leads them to simply walk away from the insulting, done with being mean. If the compliments are deflected, it insults the complimenting critter, making them mad, calling a friend or two to help insult the innocent critters.
The goal of each round is to get rid of all the mean critters and make it onward. If the player beats a level, they get a bonus for the happiness of the remaining critters.
As far as more specific than that (level development, possible power ups?, etc.), I'm unsure yet. I will create a rough playable of this and see how it goes. 25.5 hours to go!