Nice start, looking forward to see how it evolves. Muy duro el concepto 💯!
I would recommend to set an x-offset to the camera so that the player can see slightly more towards the direction its facing, since right now the camera is fully centered horizontally which makes hard seeing the upcoming bullets.
I'm linking you a video that uses the HK camera system as an example, which is one of the best I have seen of any game. It explains how HK CS minimizes dead spaces and focuses always on the important parts of each situation.