Shapist is an interesting puzzle app game from Ori Takemura and Dmitry Kurilchenko. As you can .
see, they wear cool glasses
The objective & rules are never described.
However, I'll tell you: you must slide the pieces around so that the gray field is not covered by any of the pieces. See the yellow bars? They act as temporary magnets that bind pieces together. They can also repel each other.
Very Cool Element: A block that has a diagonal line can be squeezed smaller like an accordion, if it is pushed by another piece.
There are approximately 50 puzzle levels. I've done about half of them. I'm stuck right now.
If you liked Blockwick, which I recommended about 2.5 years ago, you will definitely like Shapist. Shapist is not just another sliding tile puzzle: it's original, clever and just plain fun.