Glad you liked it! You're the first to notice that bug haha, it's really difficult to get that far so well done! (I still haven't haha) I decided to just use multiple instantiates in CoRoutines (I thought I'd put 120..oops!) instead of an InvokeRepeating, it's not a particularly amusing bug, but there you go!
I know what you mean about the mental health, I realised this after I'd submitted.. but if I update it in the future will definitely make that a slider instead of a number.. just makes more sense you're right.
Thanks for playing! :)