This one was quite a bit easier to do than the last video, since the route is very simple. The key to this level is simply to keep running and shooting bombs as you climb the spiral to the top, and letting the monsters blow up after you pass them. The only exceptions to this strategy are the Water Dragons, which require that you attack with something other than a bomb, or the flame sweeper will not work. I don't think it can go too much faster than this, but I could very well be wrong. So feel free to try this one out yourself! I'll try 4-2 next. Then maybe 7-2 because I still have the flame sweeper.