Metal Stoker is definitely good, yeah.  It reminds me of Granada on the Genesis; anyone who likes that game should like this one as well.  The graphics are a bit plain sometimes, and of course I wish it had full twin-stick shooting controls, but still, it's a good game which plays great.  I got it complete for a bit over $20 so it's not the cheapest game, but it's not really expensive either.  I don't regret it, it's good if you like this kind of game, as I do.