descriptions of entries checked and either incorporated to keywords and inspirations or redundancies removed

entries/project_starfighter.md

@@ -4,7 +4,7 @@
 - State: mature
 - Download: https://pr-starfighter.github.io/download.html, https://github.com/pr-starfighter/starfighter/releases
 - Platform: Windows, Linux
-- Keyword: arcade, open content, shootem
+- Keyword: arcade, open content, shootem, 2D
 - Code repository: https://github.com/pr-starfighter/starfighter.git, https://git.savannah.nongnu.org/git/starfighter.git @add, http://cvs.savannah.nongnu.org:/web/starfighter (cvs)
 - Code language: C
 - Code license: GPL-3.0
@@ -12,6 +12,4 @@
 - Assets license: various
 - Developer: Stephen Sweeney, Richard Sweeney
 
-2D shoot'em up game.
-
 ## Building