|After fully re-exploring Chapter 1 - Mafia Town and getting the last time rift I was missing, and a bunch more rift tokens and useless yarn pieces, then I went back to searching for that ridiculously hard to find Chapter 3 rift portal.|
I don't know why this Subcon Forest water pipe location was so hard to find... it's some random overflowing pool that turns out to be right near the bridge to the manor, by the outer wall... I must've looked pretty much everywhere else along the wall except here somehow.
Chapter 4 - Alpine Skyline, I finally found the zipline to the Windmill island after exploring the main goat fork island a little more. The windmill section has a lot of going in and out of the big windmill building.
Then the final "act" of Chapter 4... those purple plants that I saw blooming and corrupting the goats... now they've taken over the entire skyline and turned the sky all purple... The goats are now much more aggressive, and go after you when they see you. This level consists of going back to the 4 other zones where there were time pieces before and destroying the sources of the purple plants... each of the areas are being bombarded with flower missiles and stuff, and the normal path forward to where the time piece was is destroyed, and you get to some new areas where the goats lived that you couldn't get to until now... these are where the purple plants have planted themselves.
Finally, the 40th time piece is a time rift somewhere ontop of a goat house in Alpine Skyline... I went around looking for it for a long time, and ended up finding a a whole new couple of islands with rift tokens and stuff on them... also those invisible cat ninja enemies are all over the place in these new areas. Once you know they're there, it's easy to avoid them by constantly jumping around and tapping X to kill them as soon as they become visible... but they usually catch me off gaurd.
The time rift level itself has a bunch more of those ninja cat enemies too... and on such small platforms so they pretty much kill you if they knock you out.
I really, really like Chapter 4 a lot... all of its time pieces just consist of the tightest, most enjoyable platforming segments... it's like if you took the Super Mario 3D Land/World style of platforming and put it into a big open SM64-style level, so it just becomes this huge maze of branching linear paths, with some shortcuts you can cut across if you're good enough.
Now that I've fully completed the game, here's how I'd rank the chapters at this point:
Alpine Skyline > Battle of the Birds > Mafia Town > Subcon Forest