For my two cents, the jiggly images are distracting from the text and the site makes my (admittedly somewhat old) phone stutter when scrolling. Overall it feels like you tried doing too much with it when simpler would have been better.
I affirm what the other comment says, but I additionally want to note that whatever you're doing to defeat reader-mode should be avoided: it's there for a reason!
Additional notable bug: scrolling around simply breaks the transitions, leaving me scrolling around vast completely blank vertical sections until I get back to the very bottom, and then the very top.