Board Thread:Geometry Dash Gameplay Discussion/@comment-24163685-20150220024939/@comment-25651575-20150401182920

"two - three years"

Geometry Dash was first released on the 2nd of August, 2013. You post that message on the 20th of February, 2015. At the time of posting, Geometry Dash had only been out for less than 19 months, which is equivalent to about 1 and a half years.

Sorry for being a nerd :P