If you actually meant (which was official for years before 2.2), let me know and I can provide a detailed review of that version instead. Also, double-check the source of "v21" — it may be a typo or a fan-made repack.
In Geometry Dash terms:
According to multiple trusted leakers on the Geometry Dash Forums and the r/geometrydash subreddit, the "v21 verified" build includes features that go beyond simple bug fixes. Here is what has allegedly been confirmed by reverse-engineers looking at the verification certificate data: geometry dash v21 verified
To be a verified player during this era meant competing in an arms race. The verification of by Dolphy marked a turning point where the hardest levels began to require not just skill, but superhuman consistency and years of practice. The v2.1 Verified era gave us the verified icons of players like Zoink, nSwish, and Tride, whose names became synonymous with top-tier gameplay. If you actually meant (which was official for years before 2