Pretty interesting mechanics . I was really confused on scoring though. I see the 0/50 on the top of the screen, but the number never updated. Not even when no more blue balls spawned.
Thank you very much for the feedback! What you describe sounds like a bug… The blue balls should keep spawning forever and give you points when you pop them (you use the black link to do that). If you play again at any point, please let me know if you find a way to reproduce this.