I notice the hat blinking in the last 3 directions of the Red Cap Boy: SW, W, NW
I've included the the little fix in this uploaded image:
You can expand on your characters with different clothing, hair, npcs types. A sheet file with layers separating hat, hair, clothing, etc. And expand the animations to basic use, tool/weapon swing, lie down/death, chair sitting. You can start having a Patreon or charging for future works to collect support. You have a pretty solid base here, they're really cute!