Some of the most popular user-created levels in Geometry Dash included:
"Bloodbath" by Riot: Known for its extreme difficulty, "Bloodbath" is one of the most challenging user-created levels in Geometry Dash.
"The Nightmare" by Jax: Another difficult level that has gained popularity for its unique design and gameplay.
"Deadlocked" by RobTop: While this level was created by the game's developer, RobTop, it is often considered one of the best and most challenging levels in Geometry Dash.
"Cataclysm" by Ggb0y: This level is known for its intense gameplay and intricate design.
"Hexagon Force" by FunnyGame: A popular level with a unique geometric theme and challenging gameplay.
"Clubstep" by RobTop: Another level created by the game's developer that has become a fan favorite due to its difficulty and design.
These levels have garnered attention within the Geometry Dash community for their creativity, difficulty, and overall design quality. Players often strive to conquer these challenging user-created levels to test their skills and improve their gameplay abilities.