Disclaimer: This is not made to send hate to the artist in any way shape for form, this is purely for entertainment, do not send hate to the author either.
Level !, while it may be unique in the fact that it doesn't follow common backrooms formula, not having the backrooms formula makes it loose its creepiness, it just nothing feel the same as a normal backrooms level, and although this is what the author was intending, the level also has a fair share of problems.
Number 1: The entities are more like robots than entities, for example, when someone escapes level ! do the entities just go back to the start of the hallway? they could easily kill survivors by just camping at the exit, and if it is true that they just go back to the start of the hallway every time, that also means that a horde of entities, (lets say 200) all collectively agree to go back to the start of the hallway? even though they are apart of different entity species, yeah I don't think so.
(sorry about the rant.)
Number 1.5: The first entrance doesn't make any sense, you just magically appear in the level without no clipping? without anything happening to you? you just magically appear in the level? look the backrooms doesn't make any sense but there at least has to be a reason for this.
Number 2: The level itself doesn't feel backrooms like, it feels more like it was made by linear than non linear, it feels more like a game.
Number 2.5: "Instead going into the direction of the entities and eventually surpassing 10 kilometers will lead to the void, do not attempt this." This is not true as here it says "The length of the hallway is approximately 10 kilometers." so the level its contradicting itself
And that is my criticism of this level, thank you for reading this and au revoir. (goodbye until we meet again.)