Game is so buggy - hero randomely falls below terrain/map and the only thing you can do about it is restarting the game. Given that, the save system is only available at certain points - more often than not you end up backtracking 30min (or more) of the game. After couple of those, you will get that uncertainty feeling that you may fall bellow the map and stop enjoy the game completely.

I'm not sure whether it is related to the fact that the game GOG version is 1.05 when the one on the Steam is 1.9. For me, the game at the moment is unplayable.

EDIT: GOG version is actually 1.7 - my mistake. I checked GOG game page and saw 1.05 but in the game it's actually 1.7.