Pompom Games' Poppi [App Store] is a game that couldn't really exist on any other platform but the iPhone without losing quite a bit of the experience.
The goal of Poppi is touching the screen to juggle the various shapes that fall from the top, bouncing them off other shapes and off the sides of the screen before finally colliding with matching shapes and popping off the screen with a fun star explosion particle effect. As the objects bounce they make different sounds, and eventually strange melodies emerge out of the juggling chaos of Poppi.
The simple gameplay is set on a colorful and slowly changing background, and the entire package creates a very soothing experience similar to games like Zen Bound [App Store] on the iPhone and Electroplankton on the Nintendo DS.
The white rings in the video show where the finger taps would be occuring, and also shown in the video are red spiked objects and bombs which are to be avoided. Poppi is a fun game, and because the sound is such a vital part of the feel of the game, we recommend playing with headphones.
App Store Link: Poppi, 99¢