For someone who doesn't already know about them, I can't tell a thing. They need more pixels.
Though I'm sure they aren't made for me, only for people already familiar with the culture.
Good work, it promotes the Japanese culture.
......i'm wondering if OP is colorblind bc *esp* with motion it looks pretty clear to me. but if you resolve all the similar colors together + the background you picked for samples, i guess the perception will seem blobby. i mean, you could accommodate for colorblindness and lack of contrast, but at some point you have to focus on making sure your art will translate to all monitors... like without a whole team of artists, and with specific art styles, accessibility can only go so far.
i mean you gave them all moving knee joints, that's not easy
and i view a number of pixel artists who produce animations in exactly this size and subject area. switch your background up and see if it makes a difference?