Oh my gawd! I love it. Mario meets Zen garden so obvious
I love Zen gardens they really are relaxing. I love the sound of the rake across the sand. You have really come up with a winner here. Not only have I never seen a themed Zen garden aside from the seaside, but you have made it so awesomely geeky. I love it.
Keep up the pace. This has vast reaching potential
Oh and as for stuff to add you totally need some question mark boxes and some pirahna pipes! Mushrooms are also good. Goombas too!