If you haven't tried out Monument Valley yet, you're missing out on an unforgettable experience. This is quite easily one of the best, and certainly among the most beautifully done platform games available on the iPhone and iPad.
If you live in North America and are a fan of Starbucks, the unique game, which costs $3.99 in the App Store, can now be yours in exchange for zero bucks as it's currently Starbucks' Free App of the Week.
The surreal puzzler created by Ustwo, the team that brought us Blip Blup and Whale Trail, challenges you to manipulate impossible architecture and guide the silent princess Ida through a stunningly beautiful world.