There's a lot that's great about this game, but one of the best bits is their deliberate choice to make sure things have heart, but never get too dramatic. It makes for a nice feeling of playfulness without the game seeming like complete fluff.
The two stars is a more objective review and I think most people won't enjoy this game, but every few years I come back to it and beat it and have a great time. It's got this wonderful 70s zombie b-movie feel in a way I really dig.