FOSS gamedev and creative worlds

My friend and I built this map for a little fun.You run this like how you run a regular world.You should spawn at the place.Its a team map.

Only 2 sides and 1 chest on each side
No lava
Sand Wall(Dont dig it)
Very Dark

No ScreenShots cause my pictures dont load

Here's the link:
http://www.mediafire.com/?f50kgdc6bmtl6du

This world is based partly on LM's Walls Map. Here is the original link:
http://minetest.net/forum/viewtopic.php?id=2906
I want to say thank you for letting me make a new world based on the old one.

how do i play it?