Underground (UG)

Friendly Tunnels
This is the part of Underground where you are safe from war machines chewing on your scarf. As you walk in, you will be going through an area with some ruins (be sure to look inside, there is a glowing symbol in one of them), then you will reach the kelp room.

Kelp Room
This room is full of carpet kelp. You can find a glowing symbol inside a tunnel on the right side of the room.

Jellyfish Room
This room is located right after the kelp room and it's a rather deep room with plenty of big kelp and some jellyfishes. You can find a glowing symbol on top of the highest jellyfish.

Ambusher Room
This is where the "longtail" carpet gets eaten by a war machine. It looks similar to rooms that come further on, however it has a lot of war machine sculptures on the sides. The war machine in the room is not dangerous, if you touch it during the animation, it will only knock you away.

War Machine Slide
After all the war machine rooms there is a final section where you have to slide down to get to the shrine. It is a long sandy slide with a building at the end. You will find 2 war machines in the tunnel, they are not dangerous even if agitated, you can fly straight into their face and they will not eat your scarf. Near the end the war machines will agitate on you even if you are not in their lights (unless you fly over the trigger) and when you reach the shrine building, the shield will activate and push them away.

Videos
No-commentary playthrough: https://www.youtube.com/watch?v=N6-utYMAVYY&list=PLgc4x19qA79GkpkccBaXAtaUzDiz9lIsZ&index=5

Next Level
Tower