I'm going to start making Tower Defense map, where you can upgrade your towers and mobs try to attack your base. If someone wants to help I'm going to make this as a server and we could build multiple stages instead of just one. Right now I'm working on upgrading system. You can upgrade your snowmen towers by collecting minecarts and get more arrows by using tnt. I will add pictures as soon as I get something to show.

If someone wants to help be sure, that you know atleast something about redstone...