Very cool game. I loved the aesthetics - going black and white was an excellent choice.
I was a bit lost with some of the puzzles, so I would have appreciated a bit more feedback than just a grunt ;-), but they were fun nonetheless. The fact that I got my training session in by walking the stairs a lot more often than it would have been necessary can be considered a bonus (or the righteous punishment for lack of thought ^^)
Now I want to know what excactly happened and why... Glad to read you will flesh out the story a bit.