Ok, so this is might be quite over-inflated but due to limited resources and lack with graphics skills heres my idea:

You are a mutated polygon in the world of happy and completely normal polygons. Due to your ugliness and terrible additional angles you are unhappy and you want to kill everybody. The longer you exist the more mutated you become. Main features:

1. Simple but clear graphics
2. You can create your own monstrous polygon
3. Some neat narration

So, this is it… now time to work and make it playable