As soon as I put it together CoCo wanted nothing to do with it... and then I left the room. I came back and saw her trying to find her way to the top. I put it next to the window so she uses the sill to get to the next level. After about 3 days she claimed her castle and saves our furniture from getting a furry coat every week.  I'm in love with her new quiet place! 

NOTE: I followed the directions but what I built doesn't look like the picture... could be the reason for ackward leveling.