Minecraft: Under the Dome [1/3]

Today we play the Minecraft adventure map Under the Dome where the town we live in has been trapped within a dome.
Can we escape before it's too late?

Sorry about the aspect ratio - the recorded files were like that - not sure why.

Map: http://www.minecraftforum.net/forums/mapping-and-modding/maps/2290595-under-the-dome-140-000-downloads