I'm a big fan of Ribbon Puzzles when they're well done. The first such game is Colorbind (see link below). Twisted Lines ? Mind-twisting Puzzles by Megagon Industries is a fantastic addition to this genre.
  The objective is to get Your Man (the colored square) to meet its matching target square.

Here's what's cool. As you stretch your ribbon, it leaves behind a double colored tail. When you cross over your tail, the square's color trades with the first line.

More: many levels have Two Men, each having a different square. Which leads to very complicated swapping because One Man can cross over the tail of the Other Man.

There are also wormholes with optional exits - very interesting.  And Erasers that will eliminate the tail of One Man.   There are over 100 levels and at the moment I've done about 85 levels. Level 3.5 was the first real tough one for me.

Graphics: I'm not crazy about these.
1. Pillars are always the same color as Your Man. They change color with it.  I'd rather they be black.
2. Outside the grid, the space also changes with Your Man. I'm guessing this takes up too much battery.
3. Music: I always turn this off for every game. For Twisted Lines, I have to turn it off every time I open the program.

All of those are minor complaints. This puzzle app game simply rocks.

https://itunes.apple.com/us/app/twisted-lines-mind-twisting/id1064910015"mt=8
http://megagonindustries.com/
https://www.amazon.com/dp/B01M04...