Nice atmosphere visually and aurally, graphics and lighting looks real nice. I really enjoyed the game, and the main mechanic is definitely fascinating, there are lots of ways to expand on it outside the jam. The static camera is a little too... static :). It's good to see all the pillars but I think that a little bit of a swing while moving the character could be a nice touch. I liked the funny tone of the tutorial. :)
I had no problems with the HTML5 version (on Firefox).