World 5 -- It's a Jungle out There... or is it a Forest?

World 5 is some sort of forest level. There are lots of trees on the map. If this is anything like World 4 from the DS, there will be vines, new creatures, and purple water. I hate the purple water. It's like the lava- an instant death, without the burning. Levels with purple water are difficult enough to deal with alone, so I wonder how multiplayer will work out.