Thanks so much for playing and leaving feedback!
Really glad you liked the theme :)
So what you were mentioning was probably the sound playing occasionally, which sounds a bit like a “hit” noise. That actually played whenever the player would shoot a bubble and it made contact with a terrain block, which it would destroy… So no damage was dealt to the player at all during the level. I should have clarified that bit in the instructions, thanks for mentioning it!
Go get some brownies!!