I assume you have seen the "angry birds" app. launching various types of bird at structures to kill the freaky turtles (or what ever they are)
Our concept is similar but with more of a monty python twist.
We want the ability to play single player, multi-player and persistent world, challenge friends etc.
Your avatar starts with a small plot of land and a shack with a launching pad(trebuchet) on the roof.
The idea is to attack neighboring lands to expand your empire. Once you reach a certain size you have to upgrade your shack to a larger building eventually to a fortress (with multiple ad-ons like moats etc, purchasing upgrades etc. with earned or purchased tokens.
The interesting thing is that you will be launching various types of livestock rather than bombs. (cows, chickens, pigs, horses dogs etc) different animals cause different levels of damage. You can earn or buy tokens to purchase upgrades for your animals such as methane gas for your cow bombs or rotten eggs form your chickens.
You can upgrade your avatars appearance with earned or purchased tokens.
This has to have a funny twist, with english humour (monty python style)