Originally the stakes would escalate every minute. First minute, would be pretty much like it is now, but slightly slower. Second would have medical rooms being randomly taken by other medical staff (for... private reasons). Third would be the most hectic (the medical staff appear as patients, having contracted some disease from each other). In the end we had less time than we originally thought, so that got cut.
Thanks for noticing the graphics- I'm passing all those positive comments straight to my graphics guy :)