Pop is a WiiWare game by Australian developer Nnooo. The game was released in North America on May 12, 2008 as a launch title and costs 700 Wii Points. Pop involves the player popping bubbles to score points against a time limit. Players click on bubbles that float up the screen using the Wii Remote, gaining bonus points if popping successions of bubbles, and adding more time to the clock. [Info from Wikipedia] In the videos from the beta version, the Bad Bubbles were originally crosses (released version has skulls instead) and they don’t “pop” like the final version, but just disappear when you point and click at them.
Thanks to Gamepopper101 for these infos!