Trimming that would save you what? 3 minutes?
It is meant to be a short film, there has to be contrasts, pauses, build-up until the climax etc. When you have seen a film several times it is logical that you may feel weary of some parts and need to skip to the action. But you have forgotten how it feels when watching it for the first time, which again is normal
There is a central idea around Ghosts and the plot is to see all those events happening eg skeleton dance, mayor dance etc. But all these scenes can’t pop up out of nowhere, there has to be proper preparation