@onyx_tanuki even clicking 17 in the menu of squares takes you to the same puzzle. It seems like level 17 is redirecting to 27, whichever way you try to reach it.
I finished off the first guardian as it finished me off - now the black diamond is embedded in the floor and I can't find enough to continue through the 2nd gate.
This game would be a heap less stressful if you actually gave us instructions for the minigames (other than "you need to interact in some unspecified way with these illustrations") before they start. I don't know what age range you're aiming this at, but some parts are oversimplified to the point of being simply incorrect, such as the digestion.
Instructions would be useful. I completed the tutorial and still don't know how to get a score mulitplier.
It doesn't feel like experiencing the music because you're using multi-layered music and translating it into a single line, and nothing appears to follow the rhythm.
Sorry my fault, just uploaded a corrected version, cheers!