I love the cloaked character design, and the sprite animations look great! The lighting was really well done too, from the warm orange glow of the flames affecting the surrounding environment to the window lights casting onto the floor. I also liked how you reused the character sprite as statues in a different color, and the little detail of the character being the "I" in the title is fantastic!
Everything synced to the music really well, and I loved how naturally the mechanics were introduced. After encountering the spike traps, it felt intuitive that a lever would disable them. The foreshadowing of where you'd need to use the dash was great too, especially that winding path through the room!
The on beat dashing was super satisfying, and I actually appreciated that falling restarted the sequence rather than putting me right where I fell early on. It encouraged me to really master the timing. Combining the dash with the spike traps was such a natural progression, both mechanically and musically!
A couple of small suggestions: I would have appreciated a volume slider to turn things down just a little. I also wondered if keeping the little metronome visible in a corner after unlocking the dash might help players find the beat again after falling. Not sure if that would take away from learning to feel the rhythm, though!
The ending was really cute and fit the theme perfectly. Such a fun and well thought out experience, great job!