update README.md with more links to git.semicolin.games

GitOrigin-RevId: 395e354975

README.md

@@ -1,9 +1,14 @@
 # sneak
 
-A stealth-based 2D platformer where you don't have to kill anyone unless you want to.
+A stealth-based 2D platformer where you don't have to kill anyone unless you want to.  
+See [www.semicolin.games](https://www.semicolin.games) for more information, or follow us on [Twitter](https://twitter.com/SemiColinGames)!
 
-Main repository: <https://git.semicolin.games/colin/sneak>. The code is periodically mirrored to GitHub, but that mirror might be out-of-date.
+The main repository is at **[git.semicolin.games](https://git.semicolin.games/colin/sneak)**, including
+[Issues](https://git.semicolin.games/colin/sneak/issues),
+[Wiki](https://git.semicolin.games/colin/sneak/wiki), and
+[Weekly Snippets](https://git.semicolin.games/colin/sneak/wiki/Weekly-Snippets) about ongoing development.  
 
-See [www.semicolin.games](https://www.semicolin.games) for more information, or follow us on [Twitter](https://twitter.com/SemiColinGames)!
+The code is periodically mirrored to [GitHub](https://github.com/mcmillen/sneak), but that mirror might be out-of-date.
 
 ("sneak" is a codename. Real name TBD.)
+