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

entries/tux_of_math_command.md

@@ -0,0 +1,19 @@
+# Tux of Math Command
+
+_Math drill game starring Tux, the Linux Penguin._
+
+- Home: https://web.archive.org/web/20180423060214/http://tux4kids.alioth.debian.org/, https://sourceforge.net/projects/tuxmath/
+- State: mature, inactive since 2011 
+- Download: https://sourceforge.net/projects/tuxmath/files/
+- Platform: Linux
+- Keywords: educational, kids, tux
+- Code repository: (see download)
+- Code language: C
+- Code license: GPL-3.0
+
+Lost SVN (was at svn.debian.org/wsvn/tux4kids/tuxmath).
+
+## Building
+
+- Build system: CMake
+