iGem ($2.99 - 6.8 MB), along with its Lite version, is a new match-3 game alike approach where you swap a gem in any direction in order to join 4 or more of them to build a bigger one. Once built just tap to score. Build more than one bigger gem to get combos. All that while new gems are falling from the top. Finally the game has some interesting on demand power-ups (bottom right button) tilt based. Interface, graphics and animations are really nice. Tho it does not have background music it has subtle sounds (you can turn on/off). The game also includes online high score. So far I'm enjoying the game. 4/5 (first impression).