This "game" is editable by only modifying files and folders within the "data" directory; it doesn't need additional coding or recompiling.
If you'd like to make something out of it, you're welcome to try.
Here is how it works :

Saa :
Folders whose name is starting with an "S" contain numerically sorted pictures representing a complete rotation between a fixed point.
The player would go through them in-game by pressing the "right" and "left" arrow.
aa is an ID number referring to this specific spot.
Pictures inside that folder have to be .jpg files.

Dbb-cc-dd-ee :
Folders whose name is starting with an "D" are transitions between two "S" fixed spots. They also contain numerically sorted pictures from spot A to spot B.
bb = ID of spot A
cc = ID of spot B
dd = frame from which the transition starts within spot A (usually equal to one of the "Sbb" folder's file name)
ee = frame to which the transition ends within spot B (usually equal to one of the "Scc" folder's file name)
Pictures inside that folder have to be .jpg files.

Audio :
The audio folder contains :
"audioLoopDefault.mp3" which is played at the beginning and loops until another one is called.
a number of "audioLoopXX.mp3" that are played each time the player crosses the "S" spot whose ID is equal to XX.
"step.mp3" is triggered by each player's move.

So for instance, creating a new S10 folder with some pictures in it and renaming D00-01-37-01 to D00-10-37-00 will cause  the first road in the game to lead to the first picture in the S10 folder.
Good luck.