Insanely cool gimmick but rather wonky in execution. Half the time I have no idea what's going on due to all the particles flying on the screen and the mountain of bullets that forms after firing continuously is awkward to walk on top of. The main character has a tendency to dive into it if you carry enough momentum too.
Parrying is cool when you pull it off but it's not difficult to unintentionally destroy most of the environment in the process which kinda sucks because it forces you into careful platforming or shooting a mountain of bullets to progress. I think adding just a few more indestructible blocks would go a long way in this regard.