Firstly, finally got to play through the whole, complete game, and MAN was it worth it! I can see how you grew in all ways, Carrot, as the arcs went on, and just how the characters evolved.
I loved the ending in which Iggy, after letting others dictate his whims, finally takes control, not just from others, but from me, the player. I also love how that gets foreshadowed when given a false choice as to whether to get on the boat. I also like how no, the characters keeping all their future knowledge and experience doesn't magically make everything better. The whole unintentional erection incident which led to Genzou's blinding still happens. Iggy still lashes out at Gidget for winning the coding challenge. But in all cases, they listen to each other. Iggy is WAY more of a true friend this time. Genzou finally learns how to let go of Iggy. Orlam, while it's clear he and Genzou will never get along, finally has friends, real connections. Bucks - oh man, how she busts herself and Hunar out of their wedding. SO in-character for her! Oh, and of COURSE Orlam is a businessman. (I could write up a whole fan-fic short about how Orlam brings in a misbehaving employee treating those under them like pigs for the slaughter and verbally rips them a new one as only Orlam can.)
I also like when Iggy enters...I dunno, the Wishing Tree's inner sanctum? We finally get to see what everyone wished for, what Iggy's first wish was, and while seeing Saydie die along with the Tree was quite sorrowful, given the bizarre, supernatural circumstances, and given how Sadie is effectively being kept in a strange sort of undeath, I'd do the same thing as Iggy. She needed to finally rest in peace.
Now my one big criticism is this: why is the Wishing Tree, a maternal entity as old as mankind itself, if not older, holding the same views as Gidget's mother? The story leading up to the Tree's proper introduction to the characters seemed like it was just sick and tired of its wishers' hypocrisy, among many other vices, to the point of madness (what with wishes being her life-blood), when it lashed out to the characters, she'd point out all the flaws in their wishes. Orlam? You wanna make the rules, but all you're doing is running is running from the rules meant to help you find happiness - not to mention sealing yourself off from all aspects of life, even the good parts. Gidget? Your true self is a man, but you sacrifice it all for your mother's flawed view of the world and a pointless, destructive obsession over a biological man who can never satisfy you the way you OR your mother wants. Genzou? You want to see with Iggy so badly, you're willing to be blinded by his own emptiness to the point of sharing it and its active harming those who truly care for you - like Orlam. Bucks? You want your daughter dead...how do you think you got into Wonderland these last six times (at least)?! Iggy, though? The Wishing Tree's diatribe against him fits perfectly (and is a nice fourth-wall break).
OK, with that out of the way, but before I get into my non-review questions: final verdict? My good carrot, this is a masterpiece. Full stop.
This is worthy of a commercial remake. Get the money and team you need to bring the rest of the arcs up to Arc 5's level, make original backgrounds, music, etc.; hire on voice actors, like asexual Michael Kovak and pansexual Elsie Lovelock (my personal choices for Iggy and Gidget, respectively); and get more semi-animated and animated scenes in.
Okay, for the question and one 'critique' that's so minor it's a nitpick:
Why are the scenes of Orlam's Event Horizon-level flesh-orgy and Sadie's mangled corpse censored even with censorship off? I realize these scenes can easily be EXTREMELY triggering, if not upsetting and/or disturbing, but I feel those who are willing to brave the depravity should be permitted to see the images in all their horrid detail as, in context, they cement, respectively, just how completely uncaring and unhinged Orlam has become without his heart, and just how far the Wishing Tree is willing to go to get her 'perfect' wish.
Also, I don't know if this is just a limitation of Ren'Py or what, but in the scenes with false choices, the player could still be made to think that they can make a decision, but no matter which they select, they get the same scene, complete with options in the background. Just something to enhance those scenes' bait-and-switch.
Thanks for reading, Carrot, and I look forward to your next endeavor!