CollideApp

A simple yet fascinating game, where your only aim is to let a blue and a red ball collide as often as possible. The difficulty lies in the response of these balls to your tap on the screen. The blue one is attracted, while the red one is repelled. Now just try to get them close to each other anyhow. Have fun!
This version should be regarded as a beta release. Any bug reports are welcome.

To try the app, you might want to check it out on Google Play Store (look for Collide).