I dunno. I'm focusing on gameplay more ATM before a theme, considering I don't even have the people I know that can actually draw on board XD
If you make it with human characters make it so you can change the attire of them , shirt shoes hard pants skirts blouses etc. If you add anything along the line of a tutor / merc think about a lock feature to be able to hold them. And if they are locked make it like a auction to get them. If you do family's clans clubs or what ever have a battle set up with in the group. Oh yeah big thing very big idea, if you block a player you no longer see there name or comments in the world chat portion of the game unless you unblock them. One last idea have something along the silence function but let it apply to the club/clan/fam or what ever you going to call it. But only be able to be used by the owner in the club and a shorter duration, and after so many silences in that group any applying to the group would be automatically rejected. Just some ideas not sure what the set up of your app is going to be but would be very interested to see it, and give it a try, and if my ideas are used . Thanks for the time Weasel
The silence idea within Clans or whatever is cool. Except I would probably make it so that they won't be kicked, so that it won't be abused like all hell.