additions from backlog and removals because of unclear license status that could not be resolved and a bit of gitlab statistics

code/backlog.txt

@@ -1,3 +1,4 @@
+http://crazycarscpc.free.fr/
 http://www.plasmapong.com/plasma-pong/plasma-pong/
 http://www.rpgtoolkit.net/
 http://www.rtsoft.com/novashell/
@@ -38,9 +39,12 @@ https://gdevelop-app.com/
 https://github.blog/2014-01-06-github-game-off-ii-winners/
 https://github.blog/2021-05-19-ludum-dare-48-staff-picks/
 https://github.com/codenamecpp/carnage3d#other-gta-12-re-implementations
+https://github.com/dtrajko/MoravaEngine
+https://github.com/jmorton06/Lumos
 https://github.com/Razakhel/RaZ
 https://github.com/samdauwe/BabylonCpp
 https://github.com/SasLuca/rayfork
+https://github.com/Zylann/godot_heightmap_plugin
 https://libregamewiki.org/Alexei:_Part_IX
 https://libregamewiki.org/CameliaGirls
 https://libregamewiki.org/Childish_Cannoneer
@@ -87,6 +91,4 @@ https://www.seul.org/~grumbel/tmp/clanlib/games.html
 https://www.tapatalk.com/groups/imperilist/
 https://www.wurfelengine.net/
 https://zdoom.org/downloads (gzdoom, lzdoom)
-https://zope.readthedocs.io/en/latest/
-https://github.com/jmorton06/Lumos
-http://crazycarscpc.free.fr/
+https://zope.readthedocs.io/en/latest/