Sandboxels guide and independent falling sand game

Play directly in the page

This is a playable falling-sand game, not only a description page. The canvas loads first so you can place sand, water, fire, smoke, magma, wire, plant life, gases, machines, and special materials immediately. Use it when you want a quick browser sandbox, a small science toy, or a material lab where every pixel can fall, flow, burn, cool, conduct, melt, freeze, or react with nearby particles.

What is the goal?

This is an open-ended simulation with no score to chase and no single winning move. A good first goal is to create a working material scene that keeps changing for at least a minute: water cools magma into rock, fire burns wood into ember and smoke, plants grow near soil and water, or electricity travels through wire to power a small circuit. The fun comes from watching simple rules create surprising chains.

How to start

Choose sand, water, fire, magma, plant, wire, or another material. Draw it into the canvas, then use heat, cool, ignite, shock, drag, mix, erase, or preset scenes to make the world react. Start with a small brush and only two or three materials. A simple sand pile above a water pool already teaches falling, settling, flow, pressure, wet sand, and erosion.

Best beginner use cases

Use the simulator for short experiments that are easy to understand and rebuild. You can make a volcano, tiny garden, water filter, lava tunnel, wire circuit, smoke chimney, acid cave, or frozen lake. Each use case teaches a different rule without needing a long tutorial.

• Build a volcano with magma, rock, water, steam, ash, dirt, seed, and plant.
• Make a water cycle with water, heat, steam, cloud, rain-like flow, and ice.
• Test electricity with wire, battery, spark, metal, mercury, sensor, and fan.
• Compare powders such as sand, flour, dust, sugar, cement, gravel, and sawdust.

Material reactions to try

The homepage documents useful reactions in source-visible text as well as in the game. Try water plus magma for steam and rock, sand plus water for wet sand, fire plus wood for smoke and charcoal, acid plus metal for a supported contact result, and cooling plus water for ice. These examples show why a falling-sand game feels alive even when every rule is local and simple.

Scene ideas for repeat play

A good scene has a source, boundary, and reaction path. Put rock or wall around the edge, add a pool of water, place dirt or sand where particles can move, then introduce one energetic material such as fire, magma, spark, acid, or liquid nitrogen. Save the stable version before adding destructive materials. This turns a play session into a repeatable experiment instead of one-time chaos.

Tools, saves, and sharing

The toolbar supports drawing, erasing, heating, cooling, igniting, shocking, dragging, mixing, picking, saving, loading, JSON export, JSON import, and PNG screenshots. The page can work as a quick toy, scene builder, or material reference. Export JSON before testing explosions, acid, fire, or fast gases. Download a PNG when you want a shareable image of the final scene.

Mobile and performance tips

The game works on phones and tablets, but mobile devices have less room and processing headroom than a desktop browser. Use smaller brush sizes, pause before placing fire or gas, avoid filling the whole canvas with smoke, and clear heavy scenes when the simulation slows. If the page freezes, reload after exporting any scene you want to keep. Most lag comes from dense particles, high-energy materials, or too many moving gases.

Where to go next

Read the how-to-play page for the first five minutes, use the material reference for exact engine rules, and open the guide hub for volcano, water cycle, beginner scenes, status help, and reaction walkthroughs. Related links keep the guides close to the canvas so a visitor can play, learn a rule, return, and test it without losing the main task.