LineBlazer by drakfyre
Made this in 5 hours. Had a lot of fun. Check the Dev Video link for my whole process making this, which was recorded LIVE! Don't have 5 hours? The Time Lapse gives you the gist of things in about a minute! :D
Incidentally, is there only one life? If so, why have a "multiplier" at all? That usually implies combos. Really, the player only gets one score--how many yellows they managed to get.