Thanks for trying it out! Glad to hear parts were clicking for you.
Those are great suggestions. I definitely think a tutorial key for the goals would help a lot. (That one is overgrow 4 garbage tiles, by the by).
Togglable grass makes sense. At one point I had a button to show outlined icons for each edge, but it was pretty jarring and folks just left it on all the time. Reducing the tile to just a square with maybe some translucent whisps to suggest grass might be perfect.