Hahaha this is great, how could I refuse?

One thing though, you're giving people a month to make a 200 tile tileset? That might be a little long, but knowing how lazy people can get I guess you're doing the right thing

Edit: Another thing I just realised. I'm not sure if you want it this way or not, but perhaps you should tell people that you're not allowed to make conversion tilesets. Someone might just enter a sonic/mario/whatever remake of another platform game instead of drawing the tileset themselves.