This is cool man. It has that SD3 vibe to it, really oldschool. I've made a lot rm chipsets so I can appreciate the process.
One thing that strikes me right away is the bed looks like you threw a mattress on the floor, it needs to be lifted up a bit.
About shading, it looks like you put the lightest color in the middle and it's very rigid. The repeating pattern on the top of the railing looks kind of dirt, and I've found it better to keep it 1 or 2 colors cleanly running across horizontally. The shield looks misplaced on the wall, put it higher and maybe make it less long and point. Use the dark color in the middle for the whole right side of the shield, and maybe even a little of the purple in too.
It looks like you may need a midtone brown for the counter/bar thing. Also the reflections dont look right.
I like the style you have though. Like with the plant and wall, everything is really basically shaded and it looks soft and kinda cartoony. Keep reffin SD3 and CT.