Voi comes from Yunus Ayyildiz. The object is to place the black shapes next to each other and/or on top of each other to match the image at the top.
When pieces overlap, a white region is formed. There are 66 levels and at the moment I've done about 50 of them.
I've never been a big fan of tangrams. However, Voi is a very cool version of tangrams. Great job Yunus!