Sandlab - Falling Sand Physics

Drag your finger and sand pours out. It piles up, collapses, soaks in water, catches fire,
and melts into glass. Sandlab is a falling-sand physics sandbox where 23 elements react for real.

No goals, no score, no way to lose. Pour something in and watch what happens.

■ 23 elements
Stone · Sand · Water · Oil · Fire · Wood · Lava · Steam · Smoke · Acid · Ice · Gunpowder ·
Salt · Plant · Metal · Spark · Glass · Snow · Concrete · Coal · Ash · Slime · Seed

Powders pile up, liquids flow, gases rise. Density decides what sinks, so oil floats on water
while slime sinks straight to the bottom.

■ Reactions worth watching
· Sand melts near lava and fire and hardens into glass
· Lava hitting water turns to stone while steam billows up
· Water puts out fire, and steam condenses back into water over time
· Gunpowder chain-explodes the moment a flame reaches it
· Wood, oil, plants and coal burn away and leave smoke and ash
· Seeds sprout next to moisture, and plants grow along the water
· Concrete cures into stone when it touches water
· Acid dissolves almost everything except stone and glass
· Electricity travels along metal and water and ignites oil, wood and gunpowder
The in-app reaction guide lists every rule in one place.

■ Controls that feel right
· Five tools: pen, spray, fill, eyedropper and pan (zoom & drag)
· Multi-touch pouring — hold your finger down and it keeps flowing like a tap
· Brush size slider and mirror mode for symmetrical builds
· Undo, pause and clear all
· Wall presets — cup, funnel, test tube and hourglass — to start experimenting instantly
· Tilt gravity: tilt your device and the sand flows that way

■ Keep it and show it
· Save the canvas as a PNG image and share it
· Record the motion as an animated GIF and share it
· Store canvases in save slots and load them back any time
· Classic, neon and pastel color skins, simulation speed control, high-resolution canvas

■ Made for you if
· Watching things flow and settle helps you unwind
· You like powder games, falling sand toys and physics simulations
· You want to ask a kid "what happens if we mix these two?"
· You need something to fiddle with for a few minutes, offline

■ Light and safe
· No sign-up, no login, no account
· Canvases and settings stay on your device
· No camera, location, storage or contacts permission is requested
· Internet is used only to serve ads — the simulation works fully offline
· 10 languages (Korean, English, Japanese, Chinese, Spanish, Portuguese, French, German, Indonesian, Vietnamese)
· Pick your language on first launch; light and dark theme

Some features (premium elements, GIF recording, mirror mode, color skins, advanced tools,
high-resolution canvas, extra save slots) unlock by watching a short ad. Unlock once and it
stays unlocked, and there are no in-app purchases. Watching one ad can also hide the bottom
banner for 24 hours.

Contact: tk32189@naver.com

Recent changes:
Sandlab 1.1 — your sandbox comes alive.

· 32 elements: faucets, embers, vents and sowers never stop flowing; add a drain to build a loop
· Ants dig, bugs eat plants, fish swim, microbes spread
· 42-reaction codex filled only by what you discover yourself
· 60 challenges (40 free), a daily challenge with streaks, 30 achievements
· Share a canvas as a short code; 2× image export
· Sand coins for hints, skips and streak repair
· Locked features now open even when no ad is available