Well, think some smooth transitions between poses would've been nice, since I think it would fit well with your style full of smooth lines and vibrant colors, think your style is vivacious, idk. I'd suggest toning down the brightness slightly even, 'cause I think that distracts a little bit from your shapes and I think those are more expressive. Great textures though, they have a proper ammount of detail, I feel.
I also liked the tridimensionality from many parts, e.g. the characters' hair, Natz' head piece or the square, metal creature.
The plot of the video was cute but the slow, text format really hurts the drama/pacing imo (which I surmise was intentional for readability but still...I'd recommend different speeds at times for effect, sacrificing a little readability on purpose just for it). Indeed I think the slow, informative pace goes in a very different direction than your vivacious style; although I do think the music, sfx and background movement are cohesive with it.
The darker shade of the background contrasts well with the brightness of the characters too, imo (part of the reason I suggested to tone it down only slightly).
And maybe some voice-acting would fit well, again because of the vivacity of your style. And maybe a little bit of action, just a little would already fit very well, I think.
Hope the game's development has been going well, I liked design decisions from the EBF series. Peace.