Well on my end on both 0.18 and 0.19 the lib folder is empty which is the libraries that the .sh file will look into (basically the same than any program on windows looking for it's libraries).
Here's your game's lib folder as I downloaded (I tried to redownload multiple times, the file's hash was always the same so I guess it downloaded fine) next to another renpy game's lib folder so you see how it should look like.
BTW thanks for the answer :D
strange, for me both .18 & .19 worked on linux, w/o missing libs or emtpy folders. md5 of my .19 archive is 1557a4d1bdd476a09b8c71457295e8ca, downloaded via the mega link above (the early bird variant, though. but I guess jikei did not replace it between paid and public release?)
Ok, so I solved the problem, it seems like my zip file just never self-extracted properly, for some unknown reason I had to extract everything manually, which is strange since it worked fine with other games.
