OT: Any Android developers here? (Terasic Spider)

Hi all,
I would like some help in adding a few soft buttons to the .apk file that is supplied with the Terasic Spider Android app.

Unfortunately, I know absolutely nothing about Android development, but was hoping to “copy/paste” a few extra functions to the user interface, like body up / down, move parallel, etc…

I know “Hello World” examples are essential for learning any new OS, but I would like to apply this to a practical example by modifying the existing user interface, and learn as I go.

Any help / sugggestions appreciated. Thanks in advance =)