Keep it simple is clearly the motto driving Kumo Lumo. A game that doesn't ask you to do much, but delivers plenty to keep you hooked.The app follows Kumo Lumo, a cloud that you drag about the screen with your finger, while you try to stop the earth falling to bits. All you have at your disposal is rain and lightning, and that's it. Simple really, so should you download it?Kumo Lumo\nPlatform\niOS\nPrice\nFree\nWhere\niTunes\nKumo Lumo, after a brief 46MB download, gets going almost straight away. Kumo himself is moved about by dragging your finger on him, or you can rotate the planet below which he is trying to save. Depending on the level, you will have to use Kumo's powers of precipitation to save all sorts. Too much rain though and it will hurt him, making you more susceptible to the sets of black clouds that patrol each level.In order to keep going, you need to grow forests. These will then speed up the amount of smaller clouds on show, which you can assimilate into Kumo and thus keep on raining to save the rest of the planet.The trick in the game comes from the hunt for the high score. You need to keep everyone happy in a level while growing as many forests as possible and keeping yourself alive. Balance all three and you should get a high score. It is that kind of gameplay which, on the face of it, is very straightforward, but becomes more enjoyable the more you play.