Thanks for letting me know - and I'm glad you got there in the end.
Just to let you know, and anyone else reading this, I've been working on an update. The sounds you mention are actually the robots glitching out if they get trapped in corners, as well as causing noises, that could slow the game down too. The update will fix this. It will also fix the problem of balls getting stuck behind Bonbon, and rings bouncing out of the box.
I've decided not to implement chapters. After looking into it, I've realised that I would need to remake various things, and it's more time than I've got to spare. Also, I've not been able to replicate the other problems you mentioned, with events not seeming to trigger, so I'm going to have to leave those.
Thanks for playing, though, and for highlighting these issues. I'm glad you enjoyed it despite them.