Quality Index: The week's best iPhone games Land-a Panda, Collision Effect, and Rainbow Six

Welcome to the weekly iPhone Quality Index (Qi) games round-up, giving you the LOWdown on the HIGH scorers every Friday on these hallowed pages.
As you may already know, Qi trawls the web for iPhone game reviews from the worlds most respected online and print sources.
Qi then applies its own magic formula to each site (such as 148Apps, Macworld, and Slide to Play) to establish a single definitive Qi score for each iPhone app and game.
Bear essentials
Cannoning into first place on Qis dreamy leaderboard this week flies the lovestruck star of Land-a Panda, whose romantic yet dangerous physics-based exploits have propelled him to a giant 8.8 Qi rating.
The worlds panda population is dying out, so in steps or rather launches - Big Pixel Studioss amorous Yang Guang to speed up procreation matters and save the species day.
In order to do that, he must catapult himself into the arms of the gorgeous Tian Tian across 80 varied levels, evading enemies and obstacles as he soars. AppSpy contends that Land-a Panda is simple, cute and fun almost everything you could want in a mobile device game.
Cause and Effect
The aim of Chillingos latest cosmic puzzler is straightforward enough: bring orbs of the same colour together. The difficulty lies, however, in avoiding crashing into globes of a DIFFERENT colour, since they make a nasty habit of impeding your progress.
Collision Effect requires a heady mix of co-ordination and timing in both the Action and Puzzle modes, while you try desperately hard not to be distracted by the colourful explosions and trippy sound FX.
Help is at hand, mind, as 148Apps elucidates: There are also a few power-ups in the game which allow you to protect Zybbles, gain more points, explode additional Zybbles, and slow time to get more/bigger combos.
Six appeal
Tom Clancys counter-terrorist unit Rainbow first infiltrated the videogame compound way back in 1998, tooled to the nines with state-of-the-art tech, including the inordinately useful snake camera.
Fast forward 13 years and the Rainbow boys have crept stealthily under Qis radar, with Gamelofts spin on this iconic FPS pocketing five fantastic reviews in under 48 hours for an elite 8.4 score.
You can get the up-to-date information about which games are reviewing best over at the Quality Index.