18 Moves (revised)
Requirements:
5 Oysters
65 Apples
65 Strawberries
6 Flowers
Open the flowers by
touching as many as you can when you make rows. It doesn't matter if
you end up with grumpy crops at this point. They will still open them
up for you.
As soon as you get a
seed drop (hopefully) anyway near the slime, make some grass and it
will cancel it out.
If you cannot make
grass there, wait until the seeds drop under the slime and make your
grass there instead. That way you will cancel the grumpy crops.
In the same way as you
opened your flowers, do the same with your oysters. As you need two
moves per oyster you will save moves giving you more to gather crops
with.
Of course when crops
land on the grass too they get extra points.