Eh, I'm gonna help you as much as I can!!
Bro, this is not a hate review, this is a flash artist helping another artist. Okay, so the first thing is, while you understand how to work an fbf, you aren't applying it to make flashes that will achieve a high score, or, in some cases, make it thru judgement. These line fbf's have been so overdone that if you want yours to stand out, it has to be longer, more complex, and do something. But really, line fbf's are more of a warm up, or practice for true fbf animation. People get tired of watching these so lately they are becoming less and less likely to pass thru the portal. Try appling your fbf skills to a true flash with lots of meat in it, like a fight scene or comedic death or whatever floats your boat.
Good Luck