At the moment, Costel (both him and Hell Costel) might be my favorite, that might change depending on how the rest of the development goes tho
Maybe? Depends on your definition of what a "boss" is. This game will be mostly puzzle oriented but like the flute, there will be various other abilities to use. So challenges in relation to each ability would be a thing. So yea, there will be bosses by technicality lol