YANKAI'S PEAK comes from Kenny Sun. At first I thought that it was merely a triangular version of Sokoban where the object is to push the triangles onto their targets.  It's much more.
  The blue triangle is Your Man.  The first levels are fairly easy.  Then things get seemingly impossible until you discover an alternate way of pushing/moving.

There are 130 levels and I've spent a lot of time solving maybe 50 puzzle levels.  Many levels require a lot of trial and error and discovery.
New elements are added in the second round including green triangles & orange triangles that have their own properties.

$2.99 is a bargain. The graphics are outstanding and the levels were created with devilish care.
https://itunes.apple.com/us/app/yankais-peak/id1139603153"mt=8

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