http://34reqsy6tqou6avwrkm23s4mpkrwz3drtq2e5yr7sywi76h7plnaahad.onion/articles/shortgamereviews.xhtml
First of all, all the action happens on one screen , instead of Ninjatown 's...well, town. This is similar to the difference between 2D and 3D shooters - regardless of what the former does, it just won't recreate the benefits of the three dimensions. Though Plants VS Zombies does try - there are lots of plant and enemy types, and later levels introduce nighttime or different terrain.