Yin Yang Fidget

This is a fidget app. There is no score to attain, and zero challenge to it. It can be used like an interactive screensaver, and can be very meditative. This app is about fidgeting around with the pseudo physics of Yin Yang in motion.
Tapping “Start” brings you to a black screen. Continuous tapping on the screen with 2 finger sends up to 100 Yin Yang of varying size into motion. Upon collision they begin to spin. The force of the collisions with each other or boundaries determines the direction and speed the Yin Yang move and spin. Changing the speed by sliding a finger along the bottom of the screen, produces a myriad of effects. These Yin Yang objects follow Newton's third law of motion. "Objects in motion, tend to stay in motion and objects at rest, tend to stay at rest; unless acted upon by another force". Directly interact with the Yin Yang with 1 finger flick/swipe. A short flick/swipe = less energy. A longer flick/swipe = greater energy. Use your finger like a bat/paddle/racket.... As the flicked object collides with other objects, it's energy is transferred. Each object passes the energy received to next and so on... Tapping an object in motion can stop it . Tapping with 3 fingers resets everything and returns to the start screen.
I appreciate any feedback. Thank you!