hi guys
i'm making a game (i'm actualy a progammer, not an artist) and also trying to implement graphics for it.
i have read some number of tutorials before and also have seen many samples of pixel art (fell in love with it long time ago).
but i'm still a newbie, so at this point i need critique/advices.
here are the parts of tilesets combined together with some of the sprites.





i beieve the main issues i see by myself are the poor colors/lack of palette, contrast, fine light/shadows.
for example wood is greenish, gray is dull and generic, the whole 'castle' tileset looks boring (there's only one color variation used in it). also it looks not contrast enough for me, but idk what contrast will be 'enough' to the eye still can easily recognize sprites on it. but these are only my observations, idk if they are relevant or not.