Dmitry Chalovskiy contacted me - months ago!- about his puzzle app game FLUD.  It's a topology game.  The object is to flood (FLUD) the board.

  Look at the first image. The 3 white dots at the top indicate how many moves are left.  The 2 white dots on the top right indicate how many arrows you may place.

Once you've placed your arrows, you can tap on any square and swipe in any direction.
Dmitry sent me a promo code to download his game. (Thanks Dmitry.) (I didn't realize it was a beta version. For the record, I try not to play-test beta versions only because it's too time consuming.)

The graphics are good. FLUD is HARD. I don't remember how many levels I solved, maybe 20"

https://itunes.apple.com/app/flud./id1146177222"mt=8

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