[draygin]

Looks like a drunk construction worker tried to make a house. I mean you would never see a building like that in real live. x.x *shudders* ok now for what to fix

Make the walls more straight or curved something that makes actual sense rather than random back and forth these are not cliffs they should be semi symetrical.

How many houses or buildings have only one room in it? Try adding some doors that go else where or adding walls in this current level to devide it up a bit.

You change floor tiles way to much. Do like spark said and try to stick to 3 or so and try to only change when going to different parts. Such as the kitchen might have those floor tiles etc..

Level is empty. This is the biggest downfalls of inside levels. They need graphics. You could try some potted plants maybe pottedplant.png

You might also try some minor note MINOR! Lighting effects. Perhaps light casting in from the door. Or some lamps a fire places. Just something you might see indoors. Personally I would probably put a soft glow with some smoke and set the smoke to be barely visible.

Ok thats a good start right there go ahead and make some changes and we'll take another look.

Over all I would say this is probably a 4/10 It's not predefined but it looks like some one trying to make an indoor level like they make their outdoor levels.