-use up to 5 palettes - complete;
-try to give the BG as much detail as I can-complete;
-add a bit more decorations-complete;
-thinking of a way to fill the other empty space on the right-complete;
-make the layer 3 BG 512x512 - complete;
-make it consume enough tiles, while at the same time making SMW status bar functional-as I said, SMB3 Status bar is good here;
-give the layer 3 additional palettes - complete.
As for the BG, here it is:
It does consume over 256 tiles, possibly the only layer 3 that I did that uses this much. This is useful for ghost house.
Here are other palettes:
Useful for abandoned ghost houses.
Useful for a haunted ghost ship.
Here's the great:
Tell me what you think.