Online Sym-a-Pix or Galaxy Puzzle

Each Sym-a-Pix puzzle consists of a grid containing dots in various places. The object is to reveal a hidden picture by drawing a block around each dot so that its shape is ‎rotationally symmetrical to the dot, its color matches the color of the dot, there are no other dots ‎inside it and no squares are left out at the end of the solution.

Sym-a-Pix Tutorial