Excuse the name, I have wanted to use a name here for ages so I thought I would start while I had a somewhat productive post. >I'll be looking for the solution right after I have posted this.
This is the wrong way round. You should research it before asking other people. No one wants to help people who wont help themselves, and rightly so. That goes for everything not just game development.
I would recommend you study tile sets and sprite sheets from other games in the RPG style and how they handle perspective. In your room we see the bed as if we where directly above it (excluding the legs), but we see the bin as if we where standing on the ground. Think of your scenes as individual artworks, not as collections of separate objects. Try drawing them out without thinking of them as game rooms, then imitate your drawings in the game.
As for the design itself… its ugly. I'm sorry, I know that's harsh, but it really is. Recognising why its ugly is the only way to improve it. I'm going to give you some pointers, but I can't be definitive.
Look at Ponikos walls and floor. They use their limited pixels economically. They represent what they are in a simple manner, they strive for clarity rather than realism. They work with the theme of the room. Each pattern does not take up too much space, keeping it from getting monotonous - in fact good old Kiki even used a different pattern for the middle wall to break the repetition.
The floor and the wall of your room are both textured. While trying to pack in as much detail as possible you just make it look like a mess. You have strove for realism rather than clarity and in return got neither. That's not to say that realism can't be achieved in low res, but at this stage its a bad idea.
You have done a good job of breaking up the floorspace with the carpet, but there is still too much of it. As a previous anon mentioned, you should make your room smaller vertically.
You have gone for extremely bland colours, even having a white wall. While this might be more like a real life bedroom, it conveys no sort of theme and is not enjoyable to look at.
One thing that stands out to me is the bin. On the front its grated so you can see what's inside (cool of you to bin google chrome btw, open source browsers forever), while the other side is solid grey. This confuses me as you obviously drew it over the carpet becausPost too long. Click here to view the full text.