I also managed to get myself stuck - There's a room that you can drop down into. I have a feeling the ice in front of the doorway is supposed to disappear, but otherwise I'm not sure. It's just after you enter the rooms - you take the side tunnel, and instead of jumping up to the top room, you drop down. I also managed to make the crouch mess up - instead of holding it down, I'd only tap it. This meant that there were a few areas where my head went into the ceiling, as the model didn't match where the ceiling was. Other than that, looking real nice. Keep up the good work.