Hello Vertigo !
I like your game, I started to play it from version I think 0.18. On GNU/Linux operating system daily and so far there were no problems with your game. However, after the last update, every few clicks there is an error that some image file with the extension .webm was not found. I suggest you look a little more closely at the file names in the code, because I don't know if you know this, but in Unix-like systems the file names are case sensitive. For example, in one folder you might have files: data.dat. Data.dat, Data.Dat, DaTa.Dat and they are treated as different. On Windows systems, this is impossible, because the file is not case-sensitive, so this compilation probably works just fine.If you copied the Data.dat file to the folder with the existing data.dat file on the Windows system, that file would be overwritten. On Linux and similar systems, the former file would normally copy itself and there would be two different files in that folder.