So, I was wondering whether I could improve performance of my first ever "game" since I've become more experienced with Technical Art and optimisation techniques.

The aim was to optimise visuals to gain FPS increase (by switching to URP, decreasing batches, etc.). It resulted in FPS increase in 2 to 4 times depending on the area.

There was no point in doing anything in terms of coding since it's just broken and not worth wasting the time.

That being said, the game is still crappy, though I'm happy I've gained so much knowledge over the year.