The visuals and music create a good aesthetic but SSS ranks feel unearned when I can hold on to R2, stand in a safe spot, and clear the encounter without engaging in the parry mechanic. The first two bosses could be easily beaten in the first try which clashes with the grimdark world of the game.
Also, there could use the sprint mechanic from Hades 2 since there are parallels to that game and defeating a boss should despawn all of the henchmen enemies.