Good foundation and eliminates the need to build a floor.
FYI, the inside dimensions determine the usable square footage. It will be less than the outside dimensions calculate to.
The 64 sq. ft. doesn't show how much square footage will need to be deducted for area taken up by feeders, waterers, etc.
For such a small coop, you can build the nest boxes on the outside of the wall with an openable lid or front to collect eggs without entering the coop.
I build my coops...
Make the coop a lot bigger than you think it needs to be and tall enough to easily walk into.
All the numbers you see recommended are for minimum requirements, not the ideal amount of room.
If you want whole cherries, pour the batter in the pan and add the cherries by hand after the batter is in place. Drop them where you want them and them use a finger to push them in. You can vary the depth by how deep you push them. If you know what size you plan on cutting the pieces, you...
My mother always wanted Peppers and eggs which is essentially the same without the asparagus and the cheese. Once I made the asparagus version for her, she wanted it every day.