Thank you so much for the compliments! I really wanted this game to feel great once you learned how to play it, some of my favorite games to grind in UFO50 have that same exact feeling (Campanella is definitely one of those).
'parallel' and the edge-boost is actually found on an alternate path you're hinted at while looking at the final note. It's hidden in the level the game sends you back to after you close the credits 😉.
Thanks you so much for playing!