Quite the hardcore platformer, and very well put together for a solo-dev project! Took me about halfway through the experience before I understood the bell/chime motif.
The combo system was interesting in that it had consequences on the story+ending but I feel like the bell bridge undermined that aspect. But perhaps it was to make it more accessible?
I would like to criticize the slash effect not being entirely representative of your actual slash hitbox, just because most of the hurdles near the end make the assumption that the player knows of their extra 1-tile range to make the most out of their jumps.
I managed to finish the game, but I admit to slowing the game down to 60% with Cheat Engine near the end, as trying to juggle myself underneath a platform is too hardcore a skill for me to burn my fingers on mastering.
If Great Fairy Pass is the Jump King of Touhou game jam games, then this is Getting Over It with Youmu Konpaku.