Its obviously early and i assume you might know most this stuff, but just in case!
# animations
they feel a bit stiff, running animation could have a little hop/skip ( would be cute ).
the feet slide - look into "root motion" in animations/using it to have feet stick to ground better!
# art
shading looks like base shading model, could make a custom one that works nicer for your art style!
eyes tried looking in the cameras direction
# ui
you could improve ui 100x easily by finding a custom cute free font/s ( maybe a crayon type font! )
GraphicsGameplayOriginalityUnfinished