Probably hands down the single most replayable Geometry Dash level there is. It is not only just a whole goddamn card game which is a great feat to begin with, but it is an incredibly good one too. (Seriously, i've heard people buying Balatro after just playing this level and I considered doing the same aswell.)
There is so many content in this level that a single review from an amateur would do injustice to it, so I would suggest just playing it yourself to see what I mean.
Also not only it manages to look fantastic besides all that, the songs were also made by the creator for the level.