Wiz Kid Jr. is basically another variation on "link the tiles". The grid is square this time, and you need to get rid of as many linked tiles of same color as possible, minimum of 3 at a time. What's special? Some of those tiles at later level becomes "monsters" that will eat your mana. When they ate all your mana, game over! You get some special spells to beat back the monsters though... hammer breaks them one at a time, while later spells take them out in an area, and more.
It's basically a color / tile matching game, with a semi-coherent back story, but game wise it ain't that different.
Worth a try, I guess.
Wiz Kid Jr. Free Trial http://www.appbrain.com/app/wiz-kid-jr-free-trial/com.WizKidJrDemo
Wiz Kid Jr Full $0.99 http://www.appbrain.com/app/wiz-kid-jr/com.WizKidJr