This is now my new favorite of my marble race animations. I like the colors, textures and especially the camera angles and depth of field. I might have gone a little overboard with the depth of field, but I think it looks cool.

Choose your favorite color at the start of the race. Blue, purple, red, yellow or green.

Mine didn't win. Go figure. :|

Music:
Limit 70 by Kevin MacLeod
Free download: https://filmmusic.io/song/5710-limit-70
Licensed under CC BY 4.0: https://filmmusic.io/standard-license
Changes made: The song was extended by duplicating it around the five minute mark.