Interesting game.
It took me a while to actually understand what you are meant to do in the game. I'd die by shooting and die by getting shot, it made very little sense.
Eventually I figured out bullets only kill you if you have 5 shots and that otherwise you actually want to get shot to gain ammo.
I'd recommend giving more visual feedback towards the danger states of having too much/little ammo. For example the ammo could slowly flash red at 4 ammo and faster at 5, then slowly flash blue at 2 ammo and quickly at 1. It would help players develop an association between their ammo and why they died.
In addition due to the chaotic nature of triggering chain reactions; much like how you flash for a short time before dying when out of ammo, I'd recommend something similar for when you have too much. Maybe give less time since its easier to just shoot than have to collect a fast moving bullet, but I feel it would help to have a small grace window before instantly dying when full on ammo.
Overall a decent submission with a lot of style, just could do with a bit better visual feedback to help understand the game's mechanics.