Seems to be something wrong with the files. I tried launching the game, but it keeps bringing up
There should be 'paperman_Data'
folder next to the executable.
I tried flipping around the files, but no luck.
Try creating a folder, then move the exe, the "mono" folder and player.dll to it. Then take the data folder (or everything else and put it together with the 3 files I mentioned earlier.
Note: I have not downloaded this game yet. But the mistake you mentioned happened to other games. So that was the way I found it and it worked.