Simply mesmerizing. The Sandbox offers up a blank canvas on which to design a living, breathing world. Oh, the power! The game gives you the freedom to create at your own pace, while a list of objectives keeps you on track to discover new elements and interactions.
It's hard to escape comparisons to Minecraft with the pixelated graphics and elemental building blocks. The idea of 'world building' sounds daunting, but much like Minecraft you can entertain yourself endlessly just by toying with the environment. The Sandbox can be as simple or complex as you make it. If you want to set back and watch your world develop and erode, go right ahead. In that way, it reminds us a little bit of Conway's Game of Life. All of those little pixels interacting with each other...good luck setting this one down.