Bubble Tower!
Collapse the tower of "Bubbles" to land the small box on green platform below. This requires concentration and fast reflexes in order to pop the bubbles at the right time.
Heres what a user had to say about Bubble Tower: "It had me addicted for days! Its defiantly worth the download."
Check out the youtube video to see the game in action - Search "Bubble Tower iPhone" or "Bubble Tower HD"