New stages

[Chaoxys]

Spirit Tracks
Somewhat similar to the existing Wind Waker stage or to Big Blue. The main stage is the Spirit Train, which puffs along at a fairly steady pace, going through a part of each realm (forest -> snow -> fire -> ocean -> forest -> etc.)
Enemies occasionally appear in the background to attack the train (and those on it), such as those pirates who fire cannons (like in WW stage), bulls that jump over the train and hit players, or the evil rocket trains that sort of travel with the main train a bit before eventually exploding (doesn't hit the main train). The stuff in the background is probably not really possible in sprite form, though.

It should also go through the sand and final realm