Snow tileset from my cancelled hack, Super Mario World Adventure.
Unfortunately you didn't include a palmask for this. Please make sure to include a palmask with your submissions.
Also, I suggest editing the map16 so it's arranged horizontally instead of vertically. It's already optimized, but better for the section if it's horizontal since most of the graphics are already arranged that way. Resubmit with the palmask and it should be a quick accept.