I do have a piece of feedback - I was hesitant to post it because it feels ignorant of the time constraint we were under - you've built a much more complete experience than me for sure!
At the moment, the strategy is to repeatedly shoot the light. This lets the multiplier build up, then once you've gone as high as you want, you risk shooting yourself (ofc still a chance to get 0 points)
Here's my thoughts:
Perhaps shooting a blank at the light could have a less harsh penalty than reseting points to zero? Atm it disincentivises switching between light/self.
Or make the multiplier decrease more for shooting light with a blank so that the multiplier doesn't increase from only shooting at the light?