I have no idea if the developer checks comments on itch.io, but there's a minor bug I've found.
If you manage to inflict enough arousal on an enemy to skip through two phases the game freezes.
So far I've found it on Feng (stiff form) and it works on Sofia's third fight too.
Deal enough damage (let's say 20k~ for Feng), they move to the next phase but also immediately lose 1 spirit, making the game freeze.
(Amazing game btw, I doubt anyone's encountered this bug because it's been here since V25.2)