First off, I always give bonus points to games with medals. I like to encourage that.
Second, it's not a terribly designed game, but it's not really good either. I love the music, but the controls feel a little sloppy. I also didn't even realize you had such limited ammo until about my 3rd game over, and I was really confused about what could have hit me. It's a struggle getting those points, but it definitely adds replay value. It's a quirky little bit, and I like it.