STP writes: "Despite its beautiful, antique aesthetic, Zwirn doesn't offer more than the simple concept of pulling a piece of twine over all the black dots, ending on the opposite white dot. After winding through 25 levels in about 45 minutes, we had felt we had seen all there was to see, and then some.
Zwirn also has a few control issues. One is in the inverted pin movement, where the pin moves in a different direction than your finger. Also, a bug where the rope goes through the pin can force an unnecessary restart."