Do you remember Factory Balls, the stencil puzzle app game"  It's simply great! Bart Bonte made it, so he's got solid track record.
  What's inside the box" is nothing like Factory Balls. There are 100 puzzles that have to be solved. Very similar to 100 Floors from about 4 or 5 years ago.
  Not all of the puzzles are totally different.  A few are like Lights Out.  At least 5 puzzles involve dual level sliding tiles. There are some rolling ball dexterity puzzles.
There are 100 levels and each one has 2 hints available, as long as you pay the price of watching 2 ads.  They go pretty fast.  At the moment, I'm stuck on level 84.
http://www.bontegames.com/
https://itunes.apple.com/us/app/whats-inside-the-box/id1106494704"mt=8
https://play.google.com/store/apps/details"id=air.com.bartbonte.thebox

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