Well, you answered the question with your statement: you get flawless! Even if you have to skip a firework or two, it's better to get nothing but flawless hits, if possible. If you get flawless on all of the fireworks in the first round of stage one, your score should be 296 (hopefully that will change when they fix a few bugs). Compare what you get if you don't get all flawless on that level. After that is just practice! :)