Hi, thank you for trying my game. The web export doesn't play well on some browsers. You brought up a point that was cited by many people. I tried to make the instructions as obvious as possible, but without sacrifing the plot. Yes, you may need a couple of tries to figure it out. Basically, you need to collect the F3 note first, otherwise you'll get stuck. Order matters in melodies, and it sets the progression. All the monsters carry different notes, and the one that carries the F3 note doesn't growl. To collect a note, you need to click multiple times on the monster that carries it.
Maybe I should have added a visual que to the monster that carried the F3 note as well. I thought the players would easily figure it out because all monsters growl when clicked/tapped, except for one that produces an F3 tune instead.