further improvement of maintenance scripts

entries/3dcity.md

@@ -1,9 +1,10 @@
 # 3d.city
 
 - Home: http://lo-th.github.io/3d.city/index.html, https://github.com/lo-th/3d.city
-- Inspirations: SimCity
+- Inspirations: SimCity, micropolis
 - State: mature, inactive since 2016
 - Play: http://lo-th.github.io/3d.city/index.html
+- Platform: Web
 - Keywords: simulation, clone, open content
 - Code repository: https://github.com/lo-th/3d.city.git
 - Code language: JavaScript