Hi!! Thanks for reaching out :)
So, for the shadows I decided to not place them in the assets so people could experiment with it. But what I used in the mockups was a black ((0,0,0) / #000) with 50% alpha.
As for the sprite placement problems, yeah, that was "intended"... Hahaha, with that I mean I needed to make them like that so that it looked like the intended crop, even tho it did ended up messing up with it's position relative to the planting plot.