Simples but challenging puzzle game with minimalist graphics

There are several squares and triangles. The aim is to connect all the triangles with each other and to connect all the squares together in such a way that the paths of the two bodies do not cross. At first this is very simple and easy. But the arrangement of the body and their number change. A rather simple and minimalist gameplay. But over time, demanding the tasks increasingly concentration. The graphics are simple but more do not need this game also. In addition to network access, the app asks no other permissions.