Good game, bad perfomance

Interesting little adventure game. The atmosphere is very good - pretty much "2001-alike" as it was advertised. The music/sound is nice and the graphics look beautiful, but I had several slow-downs and freezes (FX8320, GTX970, 8G) on "high", so I had to finish it on "medium". The game even crashed when just trying to change the controls ingame. Initial loading time is very, very long. The interaction with Kaizen is done very well in general, but there are a few parts where it seems it doesn't understand anything (i.e. it was very hard getting the elevator to go 'up'). My first walkthrough took me about 4 hours, but the final achievements name implies there could be alternative endings. My rating would be 4 stars for the game and -1 for the perfomance/crashes. + story + atmosphere + graphics + sound - perfomance - freezes/crashes