Alphabetic by artist. The bigger the word, the more often it appears in the lyrics. Colors, shapes, images, etc., provide additional clues (but beware of red herrings.) See first comment for details.
Wait for the first slide to load, then use the arrow controls to step through the deck - it will not run automatically. Use your browser's zoom feature (CTRL +/CTRL -) to see more details. Also try
Part 1 (.../strags11/icecreamcastlesintheair)
Part 2 (.../strags11/lyricscloud2).