The grandfather clock would not function laying on its back.
The hole in the wall of the elevator shaft isn't large enough for the cage to fit through.
Towards the end of the episode start at around the 38:30 marker, there is a modern-looking car (possibly a Fiat make) parked across the street behind Mr. Poe as he talks with the children. The car can better be seen behind Snicket to his right when Snicket continues narrating a moment later. Although the time setting is ambiguous, most of the series is seemingly closer to the 1940s-1950s and any advanced technology is loosely referenced (ie: streaming TV shows on the internet) or absurdly depicted.