A minimal ui helps
So i found my scores increasing when i disabled the highscore bar and the challenge timer and also made the scenarios title very small and other hud elements out of place and be at the corner of the screen
This really helped me in focusing more on my technique and being critical of myself since I'm actively trying to aim instead of getting distracted by the timer or the bar.
Also helped in me reaching that flow state more often than not I would say those who are getting distracted try this out
Tldr: disable highscore bar and challenge timer , make ui minimal which helps on focusing