[2.0] (Insane Demon) ''Puzzle Trials'' 100% by FunnyGame | Geometry Dash 

A level that has a few years under it's belt, but in my opinion is still impressive and enjoyable to play today, the concept of short sections built like minigames was new at the time, and even though we've gotten a bunch since then, this is still really good in comparison.
Puzzle Trials is a memory demon, you have to remember which path is the correct one, when to jump before the ground turns invisible, etc, and all of this adds on to the difficulty, even the length of the level. The design is very good as well, having an arcadey retro look and soundtrack, every part is different but still meshes together nicely.
The mini bossfight at the end looks great visually and adds some needed variety, ending the level off in a satisfying way.