Waterful is that most appropriate and disquieting of things, a “nature-builder”. It’s a soft and colourful chillout game in which you cut rivers through procedurally generated landscapes with a cursor, drawing from a limited supply of water that is topped up by connecting springs. Importantly, and perhaps dispiritingly, you can dig and refill the terrain as you please. Depending on the shape of the river and the depth of its bed, you’ll cultivate different vegetation.