Hey, thanks! And totally understandable, you don't get the theme from this game. This game indeed doesn't scream "decay". Actually, the numbers breaking down half and half symbolize the decomposition nature of decaying things. It's in an abstract way of interpretation, though.
For the font, it's a font asset called CRUMPLED which I found on dafont: https://www.dafont.com/crumpled.font