wow Katy these are looking good I love the textures you've used for the Walls and the lighting and angles of the walls give it that creepy look
Wow indeed! Very exciting Katy - But (haha!) watch your composition now; you've got a line running directly down the centre of your image, which gives the impression of this being two separate images spliced together - try and avoid the centre in this respect - consider 'the rule of thirds'.http://en.wikipedia.org/wiki/Rule_of_thirds
the textures you used are amazing and you drew the stairs really well, they look great!!