This game mod is the reverse of what the game is asking.. Instaid of making shapes from simple bases.. you need to unstack a complex shape to a desired simple shape, it can start by removing 1 layer at start untill at the end you need to unstack a 4 layered shape to a 1 layer uncolored shape( hardest shape).. this mod introduces a 2 new machines ( an unstacker and decolorer )