I found this game to be just mediocre. I think my biggest complaint is how I didn't have a lot of mobility. I suppose it takes some getting used to. I didn't really have any problem with how the game was itself long, as in the format. I think that actually worked out fairly well. The music was okay.
It's just that I didn't have the feeling that I had a lot of control in this. There wasn't that much action. Having to change the bullets can also be pretty frustrating. Still, there are obviously people who like this. They are allowed to.