YMMV: Blue Sphere

  • Ear Worm: The song.
  • That One Level: Certain block combinations are insane. To simplify finding them, let's only look at blocks themselves, and refer to them via internal numbers.
    • Block 120note  has a dead end, seemingly impossible to go back. It might increase difficulty if the block only shows up once, but if there are more of them, good luck.