Callie Smith (illustrator) and Drew Cook (author) discuss the artwork in Repeat the Ending. This conversation was recorded before the Spring Thing ribbons were announced. It is primarily an audio recording, though the relevant images are displayed at appropriate times.
BEWARE!!! This recording is filled with spoilers!!!
Drew and Callie Discuss the Artwork of Repeat the Ending Note #1: Every possible point is transcribed in the file "Full Play Transcript of the Game," and can be experienced in that way. This option was not available at the time of recording.
Note #2: The requirements for earning the true ending were reduced to 17 in Release 3.