renamed games folder to entries folder (also contained frameworks, libraries, ...) and added to the backlog

entries/maelstrom.md

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+# Maelstrom
+
+_Enhanced clone of Atari's 1979 Asteroids arcade game with a visual style similar to Atari's 1987 sequel, Blasteroids._
+
+- Home: https://www.libsdl.org/projects/Maelstrom/
+- Media: https://en.wikipedia.org/wiki/Maelstrom_(1992_video_game)
+- State: mature, inactive since 2002
+- Download: https://www.libsdl.org/projects/Maelstrom/binary.html
+- Platform: Windows, Linux, macOS
+- Keywords: action, arcade, inspired by Asteroids, remake, shooter
+- Code repository: https://github.com/richardjs/Maelstrom.git (see https://www.libsdl.org/projects/Maelstrom/source.html)
+- Code language: C, C++
+- Code license: GPL-2.0
+- Code dependencies: SDL
+- Assets license: CC-BY-3.0
+
+## Building
+
+- Build system: Autoconf