In the scene where George and Cheryl have climbed out onto the roof of the cinema, a shot across the city skyline shows that there is a crescent moon. In the final shot of the film, a full moon is visible in the sky on the right hand side of the screen (it's the same night).
When Cheryl is sitting in the subway car she is holding her piano book Mikrokosmos right-side up. As she steps out of the subway car onto the platform at Heidelberger Platz, we can see multiple alternating shots of her holding the book upside down as well as right-side up.
Near the end the hero is riding around slicing up demons with the ninja sword (though their blood should be dissolving the blade) he gets clawed on his upper bicep, he even shouts in pain and anger at this.
Yet Cheryl succumbs to the virus at the end of film and not him?
Is he immune to the disease?
it's never said or explored in any media or the second film, it's like people just ignore it happens.
Moviegoers find out that they can't leave the cinema - there is no way out. But when Metropol is shown from outdoors, we can see lightened rooms through the windows. Were characters too dumb to jump out from the windows or to take down using the rope?