This is a really great jam submission! Full marks from me. If this is Dragon Scales I wonder what kind of puzzles Dragon Egg would be! Puzzle games are hard to do from a jam, but this one stood apart with the story, great voice acting and fun music! I really felt for the dragon. The last level was satisfying too.
One piece of criticism I have is I found the these blocks circled in blue really tough, this one in particular. I was really enjoying my time while playing and I was moving in a set rhythm and it took me a long time to realize this block was a real time element. I thought it progressed one stage with each block you move through, not based on time. I think I would make them smoothly animated like the projectiles are so it's clear they are real time, and maybe make them take just a little longer to do a full cycle.
Excellent job! 