This is the first time any project I've worked on could even be considered as "Graphically Intensive", so to hear that performance is an issue is a piece of necessary feedback. Due to the time constraints, I used decimated sculpted meshes when I really should be baking normal maps, and this is a mistake I will never make again. In addition, I'll be looking into graphic options for tuning post-processing, among other improvements.
Believe it or not, the environment is shaded using the Standard Unity shader, with some high specularity!
Discernability of actions is something that could definitely be improved through some extra particle systems, so that's another way to improve. It's worth noting that you can hold the mouse button to auto-fire, but that should be better communicated, so that's on us!
Thank you so much for giving it a look!