Chain Linker has been on my mind for at least 4 or 5 months. 
The object is to place tools along the path that will affect the red & blue dots to get to their rectangular targets in the correct order.
The puzzle get pretty complicated. There are splits, swappers and other tools.
There are 50 levels and I've done only 17.  Chain Linker deserves more attention as a pure puzzler. The graphics could be better though.
https://itunes.apple.com/ru/app/id1040222616

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