I do like the visual presentation of this one, it's simple but polished in a way^^
Game play is rather meh sadly. There is a log of good feedback for each successful plant , with sound and animation and a nice big counter going up.
But I do have no idea when exactly to press space/LMB as the window of opportunity seems to be smaller than the seed sprite.
But aside from this, rather big problem, I would say its a well done minimalist game that uses the theme and restriction nicely :D