There are 2 different obstacles in Swordz.io, Rocks and Ponds. They are different colors depending on the biome. They vary in size, as some are larger than others.
Rocks come in many different colors. They are widespread throughout the map. Rocks always have a Black border around them. This makes it so that you cannot go on top of them. However, if you spawn and you have shield, you can go on the rocks.
There are 5 different colors of ponds in Swordz.io. Ponds allow more free movement. They make you turn quicker, and you go slightly faster than you would if you were on the normal ground.\