Unless I missed it, there was absolutely no reference to 'The Cuckoo Clock'. That would be all that was needed to absolutely complete the homage to 'The Third Man' (1948). We had the Vienna setting, we had all manner of oblique camera angles, we had the shadows on the wall, including that of the old balloon seller, and of course we had a fugitive fleeing the police and disappearing into the sewers via one of the cylindrical billboards which surround the access ladders down.
But no Cuckoo Clock. That was part of a brief monologue by Harry Lime (Orson Welles) at the base of the Riesenrad (Giant Wheel), which incidentally is erroneously depicted in the titles in its post WW2 format. It originally had 30 cabins, but wartime damage meant that it could only carry half that number, with an empty space between each. You can see in the depiction in the titles the empty frames which once carried the missing cabins, and it is often called the "gap-toothed" giant wheel.
Harry Lime made that speech, saying that this was all that Switzerland had created in 500 years of peace, but he forgot to mention the Swiss cheese, absolutely full of holes. The plot of this one was unfortunately just like a Swiss cheese, the holes were so glaring. To avoid spoilers, I won't list them, but I pitied Matthew Beard and Juergen Maurer having to act out this rubbish.
I will give it 5/10 for all the homage to The Third Man, one of the finest movies ever made, but really, please do try a bit harder!