imports from osgameclones, added backlog and rejected lists, started libregamewiki synchronization

games/duck_marines.md

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+# Duck Marines
+
+_Remake of ChuChu Rocket!._
+
+- Home: http://tangramgames.dk/games/duckmarines/
+- State: mature, inactive since 2016
+- Download: https://github.com/SimonLarsen/duckmarines/releases
+- Platform: Windows, Linux (using LÖVE), macOS
+- Keywords: puzzle, inspired by ChuChu Rocket!, open content (but NC and ND), remake
+- Code repository: https://github.com/SimonLarsen/duckmarines.git
+- Code language: Lua
+- Code license: zlib
+- Assets license: CC-BY-SA (before relicensing?), CC-BY-NC-ND-4.0 (after relicensing)
+
+## Building