i think you just got the bad ending, if you choose to be a tree and then say that your favorite dream is the park then you get a good ending:)
bruh i got video footage of me choosing the park ("our park") and then when i wake up and try to go to the park my man say something inside him tighten and he just stayed (this part got me bewildered)
But for the first dialogue option did you select a tree? Cuz if so the game might be bugged xD
i did choose the tree. forgot to mention it in the last comment my bad