The art is amazing! I'd really like to see how you managed to make all this look like it does!
I think the plants could deserve a better tutorial explaining how to use them, or at least writing on the game page how they work, I'll admit i got stuck for a moment with no clue what i was supposed to do at the first flower!
Other than that, the puzzles are great, the controls clean, and again, the visuals are amazing! Awesome job!