what is  the install directory  for classicube like where all the .jar files are 

It depends where you put the game before running it. For example if you didn't move it out of downloads folder, your screenshots folder will be in downloads/screenshots, next to ClassiCube.exe.

Also, like Unk said, you can't mod the game to install survival test like you could with the original Minecraft Classic, because this game is written in an entirely different language (C).

Note that this game in completely written from scratch, so it doesn't have nor support .jar files

1 hour ago, Goodly said:

It depends where you put the game before running it. For example if you didn't move it out of downloads folder, your screenshots folder will be in downloads/screenshots, next to ClassiCube.exe.

Also, like Unk said, you can't mod the game to install survival test like you could with the original Minecraft Classic, because this game is written in an entirely different language (C).

ok