Still no sign of your friends. Still no promise of what lies on the other side of the portal. Still no hope for Crystal City's survival. The UFO army has begun its invasion. The end of everything is the occasion.
Lv120 - "Element 3: Eye of the Storm" (9/10)
Now, we can reflect on Crystal Forest as a whole, which is now fully uploaded (and the first post updated to include it):

The magical, cold, eerie Crystal Forest sits on the coast of Crystal City, and is the center of two very important items that the gang has been searching for: Wonderland's lost element of water, and the ominous Thunder Portal that the gang learned about back in the Temple of Elements. But, no land in Crystal City lacks resources, and you should expect plenty of secrets and treasures throughout your journey inside. From complex, intricate, slow and steady puzzles, to pattern-based action sequences - from the deep woods to the open ocean, including a sacred forest temple - Crystal Forest has something for everyone. But be careful - it looks like the Thunder Portal is approaching, spawning a hurricane in its reach. So don't get too comfortable.
On difficulty: This world has been quite a journey of its own, with many different kinds of levels - all of them in the expert-tier category. It's true that the Quest is not getting any easier, but in terms of maximum difficulty - this is about where it levels out for a while, with "Mind Games" (#110) still remaining the toughest so far. I'll be sure to update the hints/solutions page soon!
Lv111 - Climb a Tree
Lv112 - Giving In
Lv113 - UFO Trespassing
Lv114 - Stumped to the Root
Lv115 - Forest Traps
Lv116 - Currents
Lv117 - Let 'em Loose
Lv118 - Gate Insanity
Lv119 - The Floodgate
Lv120 - Element 3: Eye of the Storm
I know that all current players of the Quest are not fully caught up yet, so as usual there will be a break lasting a few weeks before we dive into WORLD 12.
Download Notes:
If you already downloaded the main ZIP (worlds 1-10), and the rest of the Crystal Forest levels individually, simply download Lv120 in this post, and extract the level into your WD11 - Crystal Forest folder.
If you haven't downloaded Crystal Forest yet, download the full 'WD11 - Crystal Forest' ZIP in this post. Extract the world folder to your Quest for the Five Elements directory, then extract 'crystalforest' and 'crystaltemple' to your Custom Textures directory.
Enjoy!