Amazing WarioMan!
I was planning on doing this one, now that I have a week of, but your arrangement makes me proud!
About the accidentals:
Measure#19 - the G natural should be an A double flat
Measure#37 - the A natural should be B double flat
Measure#40 - the F flat should be E natural
Measure#41 - in the right hand the A natural should be B double flat, and in the left hand the C natural should be B double flat, as well as the A natural in the left hand should be B double flat

Other than that, amazing work on the accidentals!
Here's a suggestion:
In the original, at measure#42, the mood of the song changes, into this pop rock kinda feel.
I have an idea of how to capture that in your arrangement:
So far the rythm in the left hand has been I-..-..-.I-..-..-.I-..-..-.I-..-..-.I
I think you should change that at measure#42 to #50 to I..--..-.I..--..-.I..--..-.I..--..-.I
I think that would sound amazing!
On a different note:
This is just my opinion:
I think the 8va is unnecessary.
I don't think the notes are high enough to make it worth it, if you know what I mean.
This is just me though..
And about the hidden layers:
It is good that you include stuff in the audio that can't be included on the sheet(in my opinion anyways), but in the cases of measure#1 #10 and #14 I don't think hiding them is neccesary. They are playable in these cases, and therefore shouldn't be hidden.
At best they could be optional, but they should be visible.
If someone were to play this, the hidden layer wouldn't be audible (ofc), and that would be too bad when they
could have been played

Great work!!!
Also, I finished my arrangement of "Morning Glory"! Go check it out!
