How long does it take a 4-year-old to beat Geometry Dash’s toughest level?

Assuming you’re referring to the level with the highest difficulty rating (tartarus), it would take you almost 4 years to become skilled with the near-impossible gameplay, followed by another few months to accomplish the level in its entirety.

It is anticipated that it will take around the same amount of time to accomplish the most difficult really certified level (Geometry Dash Arcturus) as it took to complete tartarus.

Due to the fact that it is physically impossible for 4 year olds to complete the tight spams necessary in this challenge, the most difficult assignment (VSC) would take the longest to accomplish. In my knowledge, Kyu, who is just ten years old, is the youngest player to have accomplished this feat (or maybe 11 now). So it would need many years of training to become physically capable of defeating it (maybe four years), followed by another year of playing it before achieving victory (if the 4 year old was practicing the non-spam parts in the fist few years).

The answer is “no” at each and every level. Every second, a new level is made accessible to the player to play. This is just a best-guess estimate at this point. The reality of the matter is that no one, not even those at the top of the leaderboards, has completed every single level in the game. In addition to the NA (non-rated) levels, there are a slew of other levels that get little attention. We also have levels such as Silent Circles that are almost impossible to accomplish without the usage of a cheat such as NoClip, to mention a few instances of such challenges. It is estimated that the game has around 50 million levels in total. There is no way to accomplish every level in the game unless someone creates a hack that automates the completion of every level in the game…

Needless to say, these are simply my own beliefs, and I have absolutely no way of knowing the answer, so I’m winging it the whole time.