I really like this game and I gave the latest playtest a try. However, I noticed there were some issues navigating around the space. After I'd place a plant, sometimes I would automatically start scrolling around and I didn't want to. Hopefully what I'm saying makes sense.
Also personally, I'm not a big fan of the new anti-crowding mechanic. What I really liked about the older version was that I could crowd things and it'd look natural. Now, things feel a little artifical? But overall, I really like this game and it's very relaxing.