When performing an action - digging, petting, planting, watering, there should be a distinct animation.
The expression of the avatars is very fixed - extreme happiness/sadness, exhaustion/energy, etc. should show in their face, droop of shoulders, etc - not too hard to do this in flash, even keeping code/download size tight.
The vendor spirits should have some emotion - at least say thank you, or wink, when you buy something
Selectable music for the music boxes
Otherwise, an EXTREMELY impressive piece of work. Really deep narrative and game mechanics. Congratulations!