Probably that's not the reason it freezes, for this same issue was addressed by someone that didn't have Blender installed in his PC. We are working on fixing this bug, in the meantime you can try opening the demo with Blender 2.79b (the version used for developing the game). Thank you for your feedback and sorry for the inconvenience, we hope you can play the full demo soon!!
Hiii. I just tried the game too through my Twitch's livestream, and I encountered the same problem. I don't have any Blender program installed in my understanding...
The VOD if needed: https://www.twitch.tv/videos/1522391571