VOI is another Brain bending game from the Maker of HOCUS; "gamebra. In". Totally new perspective to tangram games! Forget your mathematical knowledge! VOI came to prove that "1 + 1 = 0"! Believe that black plus black is equal to white and start to train your brain! How to play? Drag and drop the black shapes, create new shapes. 88 creative levels! 11 languages support!