I like the level
First level:
era_shop.PNG
Picture#1-You can add Npc's and some pictures on that wall.
era_shop1.PNG
Picture#2-The Table with the vertical line, can be moved up on to the wall 1 block up.
http://gyazo.com/7616822b0052cb71fffdad7bf20d98c5
The tables on the bottom left, remove the bottom of it and just put the table top only.
http://gyazo.com/cfd84933ad85e4d4440e39f9012ec2d3
Repair table, horizontal line, close both endings like if that was a stair case or walk in, but just leave the Repair table
http://gyazo.com/2318d5b6bf3163d9625e99448fc08818
Second Level
eralvl1.jpg
Maybe fix this up a little? make it like a waiting room or remove it and make another level to it??
eralvl.PNG
Chair and table should be moved down more
Also play with the level more, make it unique, The level looks symmetrical a bit.
Third Level:
I think you should give it another try.
Fourth Level:
era_mansion_inside1.PNG
It was going so good, it's missing walls, the stair case should have walls
Example
http://gyazo.com/84895541cc447b427547cc7258a47dca
Bathroom needs to be it's own personal place with a door or in another level, also it does not really need a stair case to it, maybe a door would be nice.