Nice, fun and free
I don’t understand the negative reviews. You have a 100% free puzzle game about timing and launching your ball off the springs so they do not collide with each other or the obstacle. There’s no IAP or any ads, it’s been given to you as a free game. Some levels are simple, some are challenging. I suppose there could be some variety or customization, but again, the game is completely free, so it’s hard to complain.