Cute game but bit too short. Now upgrades I would suggest is different kind of ball chances and drop speed boosters.
Thanks! Btw, luck increases the chances of getting the different balls. As for drop speed I considered it but decided against it since it wouldn't actually make you money faster, unless there were so many balls that things were starting to pile up. I want to make it longer but I also don't want to make progression slower, and I'm not sure how to do that