The Flame Throwers flames go through the air with much to slow speed. I think you should make it much faster.
By makeing it faster you might find the constant flame look more like a large amount of fireballs, one of my friends was trying to make a flame thrower and he made it kind of shot gun like, so every loop it fired it fired a more than one fireball, like 3 or 4 and make the spread just a bit.
Do you understand what I mean?
