I've come up with a thought about the game and a little theory as well, but spoilers ahead :3
(Spoilers ahead)
After the Swap ending, whenever you play the game and do a puzzle, you play as Conciseness swapped You (Aka Abra), and if you choose to do a puzzle with Abra (You after the ending), you're basically interacting with yourself, as Abra became the player/you, and you're Abra.