Whoa, that's really weird. Can you tell us when your PC seemed to work really hard? Because afaik we're not really doing anything computationally expensive.
Unfortunately I can't quite say. I was definitely pretty locked-in playing the demo until I realized that my PC was really pumping out hot air. My machine isn't the very best, but I don't usually notice it running that hot/with fans on high, not even when playing stuff like Expedition 33.
