Alright! So I played the map and it's not really hard, it's cool but if it were me I'd reorganize a bit the arrangement

NOTE: All the following review is based on the first version, the map probably has fixed some things but I still wanna give my say about everything in case it has not

https://gyazo.com/005a0512cf84bd420938949a4eb83cbf
I can guess that was a courtyard, but are you sure you wanna use concrete? Wouldn't it be better to have grass and have a few bushes in there too?

https://gyazo.com/2cdb27cb42a362729fa6b4120df63823
As inner space I'd personally use a different variety of patterns to make it feel like they're different rooms, using all wood as pattern is a bit weird

https://gyazo.com/902d0a6be730404449c935d763b84a98
Be more constant with corridor width! There were too many corridors that had from 1 block to 4 blocks of width, imo 3 blocks is the best width for corridors

https://gyazo.com/774411ac7a4c86ccd1a77bc67977ee50
This left me wondering, why did you use shower pattern? I felt weirded out, I usually use the light blue pattern for corridors, I see that those are the ones used for corridors after all

https://gyazo.com/f25fcd511931c3356e4b597ea301d835
That's too many metal detectors and cameras
When you get sent to solitary you already have nothing on you, but you wanna escape from the solitary area a metal detector is needed, but only one at the entrance! The other ones are useless
About the cameras I'd use only one for cell, but aiming at the outer wall

https://gyazo.com/12ebab2a05e6be6b1c47af61304f64ed
I felt weirded out being at the second floor seeing the below floor without roof, I personally think you should put them...

https://gyazo.com/bb6718e0186d822606e52a3b22deb9ad
That's quite a blind spot there, guards will probably never go there making it the perfect area to hide contrabband and to dig a tunnel from, in fact that's how I did
Digging there was less time and heat consuming than trying to copy all keys

THINGS I LIKE OF THE MAP:
https://gyazo.com/589c1a4aac3a9a0d38df2dbd1d1ae563
The visitor area is awesome, it's not functional but I like how it looks, although I really wouldn't use shower pattern...

https://gyazo.com/8b21bf3e187fd7ede05bc4edb0ac72c6
The edges of the island are awesome! They really feel natural, maybe I should edit my HMP Irongate 2.0 island's edges too

AND THAT'S IT.
Try thinking first if you wanna do an outdoor or indoor prison, then place the functional blocks how you think they fit best
My hint is that if you wanna do an indoor prison you should place them in a way to create a rectangle, then any remaining space becomes a decoration room just to keep the shape
If you wanna do an outdoor prison you better keep some invisible shapes to make it look good, without needing decorational rooms this time
Placing decorations need some eye skill by the way, just work on what would look good to you!
This was my score by the way https://gyazo.com/e05d7432295a5f080df6fee0bf681130