World 4 submap is done (don't know if I was allowed to change the current palettes, sorry if I wasn't meant to):

OW editor shot:

The level above the bridge is meant to be an airship level according to the level list, so its graphics apparently are to be added eventually.

OW editor shot:

The level above the bridge is meant to be an airship level according to the level list, so its graphics apparently are to be added eventually.