Thanks for the feedback, and I am glad you enjoyed it.
yeah that shot type is probably not the best for the final boss... I should of left a spread shot just before... Partially because it's piercing effect isn't too helpful against the boss (best earlier when there are enemies that track you and line up for it...) And because of its type it doesn't disappear on hit (so it could hit more enemies)
Probably should have done a flash on hit for it too... But the boss was very much rushed 😛