Sand Fall

Sand Fall is a falling-sand sandbox with no score, no timer, and no way to lose. You drag a finger or cursor across the screen and coloured sand pours out of it, one grain at a time, drifting down until it hits something solid. Grains that land on a slope keep sliding until they find a resting angle, so piles build themselves into soft cones rather than stacking into towers. The colour shifts continuously as you draw, which means a single long stroke lays down a whole gradient and a pile assembled over a few minutes ends up banded like sandstone.

The stone tool is what turns a toy into something you can compose with. Stone does not move, so you can draw shelves, funnels, hourglass necks, and channels, then pour sand across them and watch it find every gap you left. Narrow a channel and the flow chokes into a trickle; widen it and the whole pile above collapses through at once. The eraser cuts holes in anything, including the middle of a settled heap, which produces the single most satisfying event in the game: the moment a hollowed pile realises it has nothing underneath and slumps.

Everything is simulated grain by grain on a fine grid, so the behaviour emerges rather than being animated. Brush size and flow rate are both adjustable, which is the difference between a delicate drizzle and burying the entire screen. It runs in the browser on desktop and mobile with no download and no account, and the clear button gives you a blank screen whenever you want to start over.