Splashy Dots by Crimson Pine Games FREE

  

Splashy Dots looks like an abstract art game. In essence: it's a maze game.

  

The object is to start at the black dot and move horizontally and vertically and get to the black ring. Along the way, every other circle must be visited once and only once.

There have been other games similar to this one. However, Splashy Dots does not allow jumping over dots.

There are thousands of levels.  I've done about 10.
https://itunes.apple.com/us/app/splashy-dots/id1230045214?mt=8