I have spent hours to rework my bullet system. The previous system was functionnal, but it lacked clarity as I was merely messing around. I know have a system that give me more control: I can easily define the time interval between each bullet and a realoading time (or not) between each salvo. I also have optimized the different shooting modes, each one corresponding to a moving pattern.
I also added some fireworks in the post boss screen ^_^
What remains now is essentially polish, a few graphic updates and a lot of testing under real playing conditions.