Like 4 games in one! The graphics (flying domo is great) are all well done (even if they are ripped), and the backround music is perfect arcade material. The dialogue is generally amusing, and gameplay is nearly seamless. The only real complaint I have is that there's no temporary invincibility when you rise from the grave, often meaning you're hit before you can even move. But all in all, anyone who likes crappy old arcade games has to try this.
Oh, and the intro is pure coolness.