The mechanics I used were that anyone stepping on the "green" sections next to the water (slippery algea) had to roll a DC 10 Dex (Acrobatics) check or fall prone. The water on the west side flows over more algea, requiring a DC 15 Dex (Acrobatics) check or fall prone and be pulled 10 ft. toward the waterfall. There was a vehicle on the bridges (hence the "tracks" on the other side) when I ran it. Feel free to remove those brushes if not using it. Otherwise... the map worked well!