Thanks for playing Planet Balls. It took some effort both in implementation and in the level design and your appreciation pushes indie developers like me to do more video games. The later levels are challenging and sometimes it's necessary to make the balls cooperate with each other.
However, this game didn't have a big spread, I think mainly because it was not distributed through some game publisher, but I prefer to remain a 100% indie developer... ¯\_(ツ)_/¯