Blockmerging

Similarly to games like "Merge!", or "Cube Combination", you merge cubes by dragging them into one another. It's not too complicated, really. Just merge and merge as many times as you need or as much as your willpower defines, and see how far you can go. You'll take forever, certainly, but I never said you couldn't try. Some might find this as just a relaxing experience, or a sweat-inducing speedrun challenge, but it's all up to you on how you prefer to play.