The light is supposed to be coming from right. Although I see your point, I should have put more shadow in left side of the ground tiles and grass and less on the left side.
Regarding dithering, this is my first time trying to do noticeable amount of dithering and I got so in to the mood of it xD, I'll keep what you said in mind, regarding balancing dithering and textures, thanks.
Honestly, I was not prepared what to do with the background, but I was running out of time so I did what first came to mind ( regarding the sky and lighter grass on the sides ), regarding the sky, I wanted to make it seem like day was ending and night was coming out kinda, to validate the lightning and to blend the border of the mysterious hill the column was on.
In addition, one of the colour boundaries tangents with the top of the column, making it look attached to the column rather than like a background.
I am not getting what you mean, not sure which parts seem attached to what and how.
Thanks you very much, eishiya. I'll keep in mind what you pointed out, and will spend more time in the sketch period and get a better Image of what I want to draw before going too deep and finishing it. I probably won't be doing any edits on this at current time at least.