I have listed few things for improvement:
1. 0101 whale, rerender, the pose and swimming by (no motion blur)
2. 0107 Color and camera movement
3. 0201 butterfly texture, 0202 texutre, camera
4. 0401_overview, flower lake of frames
5. 0501, oldman sliding
6. 0503, oldman lighting/eyes texture
7. title, effect test
8.0201 splash slow down
9. 0104, big butterfly rotate with the whirlpool
10. 04: lotus color (lower saturation); Butterout, tail last longer
11. roof wet texture and reflection