Here is the beginning of the challenge map, I'm still working on burning off the leaves, the find/replace operation for leaves doesn't seem to be working right.
The idea is that you're in a desert, and besides the tiny oasis I'm going to be making there's no wood to be had.
Among the hazards of the desert are the huge fields of cactus, the lack of food, and sudden cave ins.
The landscape changes at the moment:
Grass > Sand
Dirt > Sand
Gravel > Sand
Water > Sand
Tree Trunk > Cactus
Flower > Cactus
You'll start off at an oasis with a very small renewable supply of wood and a chest with a few supplies. I need suggestions for what to include, but currently it's:
1 workbench (so if you completely blow all your wood on the first day you can at least craft)
3 seeds
3 flint and steel (there is no gravel in the map)
1 wood sword
15 wool (you'll need to pick which pieces of armor you want to make)
1 apple
If you walk far enough in one direction you'll start generating new chunks and they'll be full of grass, water, trees and pigs. The desert area isn't a perfect square, you could walk in 2 minutes in one direction and still not see the end of the desert and 40 seconds in another and be standing in a lush forest. I don't care what you do with the map on your own but I'm hoping for the map challenge people stay honest and don't wander off into the green and come back with arm loads of ham and wood.