Sandspiel
sandspiel.club
Draw with sand, water, fire and plants and step back
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Sandboxes & Simulators
A sealed glass ecosystem that keeps going without you
orb.farm
A minute · Best on desktop
Free, no sign-up · online since 2019
Max Bittker's closed aquatic terrarium runs on falling-sand physics. You add water, sand, algae, plants, fish and snails, then adjust light and heat and watch whether the nutrient cycle balances or collapses. There is no score, only whether the jar is still alive tomorrow.
Everything is coupled, so overfeeding the fish clouds the water, starves the plants and kills the fish a few minutes later without you touching anything.
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Picked for a shared category and overlapping vibe, not for popularity.
sandspiel.club
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