If you are a trying to beat extreme demons, stick with 2.1 (via GD Lite or a stable PC build). The physics are known and tested.
versions highlights a progression from simple cube platforming to extreme, frame-perfect challenges. Timeline of "Hardest Level" by Major Version geometry dash all versions top
Introduced "straight flying" and brutal orb spam, pushing the limits of mobile play. Cataclysm If you are a trying to beat extreme demons, stick with 2
Objectively, 1.0 is the "worst" by modern standards, but it is the most important. You cannot have a mountain without a base. It ranks here for historical reverence. Timeline of "Hardest Level" by Major Version Introduced
The standards for what constitutes a "Top 1" level—the hardest rated level in the game—have shifted dramatically with each update.
In 2017, Geometry Dash 3.1 was released, featuring:
The second version of Geometry Dash was released in 2013, bringing significant updates to the game. New features included: