Okay, here are the results.
Well, giving the player Cape and flower at the very beginning may give the first impression that this level is going to be very difficult or the player may break the level. (even though you can't)
This koopa is a bit unexpected, even though it doesn't actually hurt the player at first so maybe you could remove it.
This moving Question block might disappear, forcing the player to use their cape, which the player may of already lost.
These thwomps come out of nowhere and not even the coins help, the player might ignore them and end up getting hit.
Maybe you could make all of the door tiles act as a door, because I had to open it up in lunar magic just to check that they were actually doors.
You forgot to enable custom pallets, didn't you?
In all, this level was pretty interesting, but some players may have a hard differentiating between what it solid and what is passable and also, why are the pallets for the sprites and Mario not monochromatic like the FG and BG?
So that is my feedback of your level, I hope you make some changes!