Good story, good puzzles, good implementation of verbs, hints are given when appropriate.
Actually, I only have a very small criticism to make: in at least two situations, we can get definitely stuck without knowing it. The first case is when trying to take (Spoiler - click to show)the miracle-grow jugs in the worksheet one by one, then the game only says "you should have done this when you had the chance", but lets you continue, which is ambiguous. More generally, one object is essential to the game, and should not be disposed off too early in the game, which is not very clear at first ((Spoiler - click to show)the wheelbarrow). The second case is when (Spoiler - click to show)you jump into the window without anticipating on how to get out after that. I think it would have been nice if the game had said something like "you should have thought of this before doing that, now you seem to be stuck".