The game is fun and enjoyable, my only gripe is all the separate downloads you got to do to play the game with the extra images, wasnt really much of a problem until recently it just simply stopped letting me download things at all, it never registered unzipped files in general for me either though it could just me misunderstanding what the files meant by unzip into the incarsoul_data
The way the zips work is that they have a StreamingAssets folder in them, which can be extracted into the incarnasoul_data subfolder to put the files alongside any already present.
The folder is different on macs ("/(user folder)/Library/Application Support/tl/Incarnasoul/") but should work the same.
If the in game downloads aren't working, it might be Mega's download limit? It resets each day I believe.