People who are expecting a shooter will be disappointed. Think of it more of a puzzler. Also those who have loved the Dreamcast Bangai-O don't expect the same, just think of it as a spin off title, you might have more fun that way.
Will give this another go, I know the NA version is gonna have some different features, will be easier (like it wasn't already!), some new levels & the view has been zoomed up too, not sure what that'll bring to the gameplay but whatever its not like it'll cost me to give it another try.
The last time I played it was June I think and that was only to play that Metroid level, which was fun. Even though I wasn't into the main game its still a keeper for playing other peoples levels.