imports from backlog, updates

entries/sandspiel.md

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+# sandspiel
+
+_Clone of Powder Game._
+
+- Home: https://maxbittker.com/making-sandspiel
+- State: beta
+- Play: https://sandspiel.club/
+- Platform: Web
+- Keywords: simulation, clone, inspired by Powder Game, open content
+- Code repository: https://github.com/maxbittker/sandspiel.git
+- Code language: Rust, JavaScript, TypeScript
+- Code license: MIT
+- Code dependencies: WebGL
+
+Developer: Max Bittker
+
+## Building