I am late to this topic, but wanted to say I've had a lot of fun with this worldmap.
One issue I am having is that I have the 5 keys now, and am at the level named The Natural Elements Together and Saved, and once I am through the first gate, the pipe to the right is just blasting air to the left so I cannot get past this first part . If I have airflower, I can float a little bit, as far as the first smash block (which quickly descends of course to hit me) but am quickly whisked back to the left by the blasting air from the pipe. Can't see a way to get on top of the smash block things. Is there something else I have to do on the map before this level, or am I missing something?