This looks really impressive!
I had a level idea the other day and I've decided to use this tileset right away.
I've attached the resulting level and would be curious if anyone can find a backroute.
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I've noticed 2 things:
- The water's trigger area should reach 1 pixel under the water. Currently it would be possible for the lemmings to walk on the bottom of the ocean as a result.
- The teleporter/receiver is missing an IN/OUT sign.
Apart from these things I would not hesitate to put the style (and also the chalkboard one) into the standard NL styles download.