This is a really fun game. I love the gameplay loop of running the spiral to earn points then buying more stuff in the shop to spiral even more.
It was a good idea to make many of the unlockable items options you can turn on or off, as well as customizable. I personally preferred the auto-clicker to manually clicking.
I also liked the spiral and pendulum minigames. They were a small deviation from the norm which helped stop me drifting off as easily. The gemstone felt a little intrusive since it took up a huge part of the center of the spiral. Would be nice if I could turn it off individually.
In my opinion, I found Dr. Faustus to be a lovely tist to submit to. Level-headed and accepting with enough eccentricity to be interesting but not too much to be distracting. Her experiments were simple relaxation and focus trances which I really liked. I would love to do more of her experiments.
Her theme was also a nice palette choice especially with random colours on. The muted colours make the sky blue really stand out whenever it appears. Reminds me of ripples in a pond on a rainy day.
I found the snake to be less interesting. It was a very sudden shift in aesthetic and personality. The golden textbox and the offset, more imposing portrait were visually louder than I was expecting. His personality was also very demanding off the bat while I'd built up a familiarity with the more easygoing Doctor. Perhaps that's just my personality though, or that I didn't have as much time to build rapport with him.
All in all though, I really really loved what you did here! I can't wait to see more!
(also, is there a way I can submit bug reports? I noticed two very minor bugs at the end of the game)