Globe Survival

Hi, this is my first ever challenge map.
The aim of the map is to survive and complete as many of the challenges as possible.
This map is still in the first stages of creating, and I have version 0.0.3 ready for download.

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This map was based upon the Skyblock.

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Rules:

Do NOT jump off the world's to re-spawn and then regain all of your health.
NO Mods, Hacks, Flying, etc.
Do NOT play on peaceful.
Have FUN!
Do NOT use TMI!
If you get obsidian, that's just bad luck.

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Challenges so far:

1) Build a Cobble Stone generator.
2) Build a house.
3) Explore all of the globes.
4) Make a farm with wheat, pumpkins, melons and sugar cane.
5) Make a giant red mushroom.
6) Craft a bed.
7) Make an infinite water source.
8) Craft a furnace.
9) Make 20 torches.
10) Make 10 signs.
11) Make 10 melon slices.

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Please give feedback!
Comment telling me what to add, challenges etc.
Post images of your success so far.