Should I buy this game?

[Blackhand]

Anyway there was a strange bug in the demo that caused the entire screen to flip upside down, so we were basically walking on the roof. It made the game less scary and more difficult because it was hard to solve some of the puzzles and we got lost quite a few times XD.

its not a bug its a feature of the game that can be turned off, i had the same experience though i didnt like the feature and everyone just turns it off. just go to graphics and click insanity off. it is just a feature that didnt really work out that well

That is a bug, it is fixed in the patch and should also be fixed in the newer version of the demo on Steam.