It's about time someone picked up the rights for this and got on with a second instalment.
For it's time the graphics where well executed, and styled perfectly to the genre, and doffs of the hat to the likes of Ghostbusters were well taken. But of particularly high merit where the sounds and music of the game, which all set the tone so perfectly and immersed one well into the settings of each level.
There did seem to be the occasional balance issue, where it would take you a little too long to build up the correct amount of power to progress easily, but a little bit of patience would get you through any of these points.
This is a game I'd quite happily plan over to this day, and the fact that it hasn't been retired to my attic speaks volumes for it's playability.