Last month a little gem popped unnoticed on the App Store named Cover Orange. Following a recent promotion giving away the game for free, it has now reached the top 10 list on iTunes. The premise is for you to move from level to level, protecting oranges from acid rain. The first thing you notice is how similar this one is to Angry Birds, from the way the levels are made, to the physics properties that the gameplay relies on. In this case, instead of throwing birds offensively, you have to protect your oranges from the nasty clouds and their acid rain.

Both the graphics and sounds are amazing, with the oranges themselves thanking you for saving them. The animations are excellent, with everything flowing nicely from one sequence to the next. Solving physics puzzles is the meat of the game, and you get access to various objects to try and cover your oranges with, like barrels and wheels, by interacting with the other items on the level. High scores are linked to the Game Center, but it's just a lot of fun solving each level. The controls are extremely simple, you simply grab objects and let them drop where you want, and watch how they interact with the level.

The game costs $0.99 and is available for iPhone, iPod touch and iPad. It comes with 120 levels, 40 of them being new as of the latest update. The video trailer shows the game well, and at this price, it really is a must have.