This reminds me of the music video animations of the 70s and early 80s. The pacing is pretty good, and I like the sketchbook style animation. For some reason the serpent and its fireballs seemed off a bit visually. I'm guessing that's because you had live action reference for the people and the studio, but you had to invent the serpent. I faced a similar dilemma in my current project and chose a different style. Good work.