The tileset looks amazing as always! Great job! If you notice any issues, feel free to post below!
I have 3 little remarks:
- The trigger area of the water should go 1 pixel lower than the graphic. If you would put the water exactly on ground level and let lemmings walk on said ground level they would be able to walk right through it. Consider extending it 1 pixel lower.
- Consider adding a little "IN" and "OUT" sign on the teleporter/receiver graphic. I noticed the animation hints at which being which, but it is not crystal clear.
- I would mabye add another yellow row to the zapper trap (towards the trap middle) just as a little extra indication (maybe even 2 rows). 1 pixel can be a bit thin expecially if uneven terrain covers up parts of it. Maybe the 2nd row can also be slightly shorter than the first to create a little pedestal, but I would choose what looks best here.