This is such an amazingly creative and thematically inspired game that I completely forgot the description mentioned the use of AI in coding it. You truly made this your own through the art direction! This was such a breath of fresh air.
That said, there is some technical room for improvement, particularly in terms of various UI issues. The pop-ups have a pesky issue of overlapping each other (as well as staying on-screen too long for the ones you can't manually close), and there's an annoying repetition of certain tutorial messages that shouldn't be there (particularly the messages pointing out what's to the left and bottom of the screen). The bottom menu will stutter if your mouse is too low on the screen, which was probably the biggest flaw I noticed. Still, that's such a simple fix and it says a lot that it was the biggest flaw! There was also an issue with the drop down menu on the "island color" editor menu not working. Also, I couldn't really set it to certain colors since it felt like whatever color I selected was "filtered" through the island's default yellow/tan/sand color, meaning my attempts to make it cyan made it an off-green.
I tend to hesitate to say this, but those flaws aside, this is a special game. It's the sort of game where even playing it for 5-10 minutes, it'll stick with me for 5-10 weeks at least where I'll start thinking about it again. My favorite part was unlocking the lil kangaroos to hop around my island. It's really making me reconsider the art direction on my projects; not that I want to emulate your style, but I want to have the same passion for the visual appeal of anything I make as I can tell you had with this one. Final tiny suggestion, to balance out all the praise: It'd be cool if the player could zoom-in and zoom-out, even if only slightly, to help the world feel more "3D" and alive.
This was very great! 200 hours is already a lot to put into something, but if you took a final couple hours to iron out the tiny issues, it'd put this on a whole other level above its peers. Seriously, you've got a homerun here!