VOLUME
I'd recommend you vary the volumes a bit, as having all sections have the exact same volume makee the less intense sections sound very loud & have little to no contrast.
My suggestion would be for you to lower the volume on less intense parts and increase at more active and intense ones. (I can't really give you exact suggestions without a wall of text so that's why I'm leaving it up to you)
HITSOUNDS
You should change the default sample to 'default-normal' instead, as having it as 'default-soft' makes for very unbalanced hitsounds, considering how the dons are way louder than the kats, which is not appropriate.
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