Great level design, lighting is a bit dark though.
Is there anything to do in the house yet? Or still in development?
The walkthrough is pretty handy when there is no indication if I am doing something right or wrong.
As a side note, do not use the same texture for a button where player has to push block to press it, and for buttons on which he can just stand on. If not for walkthrough I would walk around the mansion with the block till the end.