Well no pun intended and I won't say the word, because you probably know anyway which one it is. It starts off with a quite gruesome scene - and then gets brutal. Yes you can say this was another pun. Old people in our society have it quite bad to say the least. Generally speaking that is - the director somehow made some observation of that, while being out in town. I guess he saw how alone they are - or he felt they looked that way.
There are some real worries and problems he integrated in the movie. I know that many at the festival I watched this had issues with the performances. I actually liked most of it. Yes you do have cliche scenes ... like the one about love and being eternal or not. Of course this also plays into the aging theme ... but could have been handled better.
This points at an issue our society has - one that will not end up the way it is portrayed here.