With so many auto-runners out of late, I'm sure your brain could use a bit of a stretch, so we're happy to be working together with the team at Free App Alliance to highlight Cover Orange, a great free app for you to check out.

"In this excellent physics-puzzler, you protect lovely little oranges from nasty acid rain by building makeshift forts from wheels, wooden beams, and other objects.

There are a whopping 380 different levels waiting for you inside this app, and plenty of Game Center-powered achievements to unlock.

Cover Orange has been updated to support the iPhone 5's 4-inch display, by the way."

Check out our review of the game here:

Cover Orange Trailer:

Download it now and get the best free apps every day from the Free App Alliance app.