1. Try and nab the launch weapon. It fires fast (5 in the air at a time) and you don’t have to aim particularly well. I like it over the rapid weapon or spread weapon because it hits everything in between rotation moves. Also, it gets annoying if you shoot off 5 rapid bullets and they don’t hit anything.
2. To use this strategy, you will have to move around a bit, otherwise lily pads will enter the area you and where the bullets fall. Moving is ok, because if you start to move in one direction, you should turn all the way around and push gently. That way, the most you’ll be drifting is very very slowly, and sometimes you can even stop. At the end of each level you get repositioned into the center if you are off to the side anyways. This way you can also get all those flies instead of waiting for them to come to you.