Version 2.1.1 patch notes:

• Fixed projectile bug that would shoot out an errant cross at a diagonal angle that would disrupt whether or not a projectile is on the screen
• Fixed bug in the ending music that would suddenly make it very loud for a single note if a screen transition happened at the same time
• Adjusted the sound of the holy hand grenade to be more impactful
• Fixed bug that would negate the sound of the boss receiving damage if the player moved on the same frame as a projectile hitting