Simple, powerful and well designed, minimalistic puzzle challenges you to take different points of view to recreate a shadow, made of stacked blocks. Content includes 60 levels. Progress is automatically saved.

Other than an early ping to "rate this app" there are no ads, high-scores or time limits. It's easy to reset a level to try again. We would've liked the ability to jump to a harder level at any point, however. No language is required, and the tutorial is very well done. From creator of Evo Explores. Thanks to Barry O'Neill for suggesting this app.