The purpose of this tutorial is to familiarize yourself the basics of modding for Delver. You should have some basic knowledge of working with files and folders, and how to use an archive utility to extract it's contents.
First of all you must locate your Delver jar file. If you bought Delver through the Humble Bundle you have a page where you can download it, download the Linux version for the jar file.
For the Steam version, this is where you will find your .jar:
Create An Assets FolderEdit
In the same directory as the Delver jar file, create a folder called 'assets'. Delver looks for this folder, so it is important that it is name 'assets'. This is where you will put all of your custom content.
Extracting Assets From DelverEdit
Open the Delver jar file with an archive utility program, and take note of the file structure. It is important that you have the same names and hierarchies present in the jar file.
These is what it should look like, with only the files that can be changed by modding. All other files are unnecessary.
Now the hard work begins! Edit the various assets to your heart's content. You changes will be loaded when you run Delver.
Where to go from here