Arrow Domino is actually a maze puzzle game app.  The object is to tap on one of the arrows within the grid and somehow get all the arrows to tumble down, like a string of dominos lined up.  Why is this game classified as a maze" Because the essential questions are where does it need to start and where will it exit"
Some arrows: topple 2 neighbors or 4 neighbors.

Some arrows: skip its neighbor.

There are 108 levels and they're not hard. I did them all relatively quickly.
https://itunes.apple.com/us/app/arrow-domino/id1090818389"mt=8

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