I like that the layers can be brought to the front (or not) by clicking, so that different effects/outfits can be created. The dog theme is a nice touch, as is the sparkly "go" finish.
An elegantly designed game. In gameplay, it has a few similarities to Alchemistry from Puzzle Pirates and the juice-related game from Neopets. One of the differences I appreciate is the lack of a timer on Loops of Zen, as timers seem rather anti-zen to me. ;)