Geometry Dash Anteroom is a pretty good level with Insane details and fun gameplay without any flaws. Sometimes players may confuse some parts because a few details have the same design, but that is not a big problem. As always, the coins are still in unpredictable locations and players need to be flexible to catch them. In addition to normal obstacles, players also need to face deadly lasers from traps and even from the giant final boss.
The closely related and highly cohesive designs will make you feel like you have entered a new world with many things to explore. The hardest parts might be the ones involving coins, other than that, you don't need to worry about boss attacks and how to avoid them, the level will help you with it all. All instructions are shown on the screen by the author, you just need to follow the arrows, avoid traps, fight the final boss and win. Good luck!