Dynamic on Track has the reputation for being one of the most cancerous levels in Geometry Dash. It contains so many fakes to trick you, and the amount of trial and error is very unhealthy. When the speed goes triple speed, you have to know the level by heart in order to beat it because you can't rely on reactions for fast paced levels with some memorization. It's also underrated in difficulty, being only rated hard 5 stars when there are harder, insane, and demon left to choose from. I think the level is demon considering the amount of memorization required to beat the level, and while it is fast paced it doesn't have very fun gameplay.