A level being super long only matters if it has more good to present to you. This level starts with nothing, and it stays there for the entire duration. 500×0 is still 0. For the record, it's perfectly fine that Split just makes levels for fun without worrying about making a masterpiece or anything like that. I'd much rather the creating scene be full of Splits than full of quids. However, none of that changes that I think the level sucks.

how to platformer but livelier and with more ideas put into the overall gameplay it’s pretty good

there's no way people actually think this is less charming and less creative than How to Platformer, right? surely the level with unique gimmicks and actual effort put into decoration and song choices beats the level consisting of 90% padded rooms and virtually no deco? right?

So I see in a lot of places that this level is just like How to Platformer, inspired by How to Platformer, etc. I would really like to know what exactly the inspiration is, because to me the only and literal only similiarity is that it is a long room level. The decoration this time while still keeping it simple, are decently pleasant to look at, and feels more like an intended bit of minimalism rather than swipe tooling a single ugly color through your entire level. The gameplay is infinitely more interesting than in HTP in my opinion, using newfound ideas and varied gameplay here and there, although still also somewhat sticking to the same old basic difficult gameplay tropes.

However, this level still contributed to the problem which is what we refer to as "roomslop" nowadays, since creators hungry for their next creator points thought "what if I used this decoration but made only 10 rooms instead of 500", generating tons and tons of effortless, basic, and zero-thought creator point platformer levels. The reputation of platformer mode is still I feel fairly low among the wider community, and I partially blame it on the fact that so many levels got away with producing a whole nothing, because they saw other creators can do it too.

How to Platformer but with less rooms, no charm, no unique ideas to make the level less boring ans tedious and repetitive, and it also has terrible gameplay.

terrible level

This level is unimaginably painful to play, and even more so boring to look at.

Let me start off by saying that this is of course a room based level, a genre which I don't really like to begin with, that said I do still enjoy the level this is based on, how to platformer, much more. The difficulty progression of the level is very simple, it gets harder the more you play, which makes sense, but it got very annoying by the end of the level after having already put in 4 and 1/2 hours. The visuals are insanely basic, frankly I don't even think this level should be rated. The decoration stays the same for basically entire segments of the level and by the end I could barely tell the difference between each screen.

In summary, tedious & annoying gameplay paired with overly simple & generic deco makes this 500 room long level a slog to play.