Remove stale play standalone file: README and INSTALL point to the title-screen download

README.md

@@ -16,7 +16,7 @@ An evil little dungeon game for the browser - in glorious pixels, in 3D, for fre
 </p>
 
 <p align="center">
-  <a href="play/DungeonCraft.html"><b>▶ Play now - download one HTML file, open it, done</b></a><br>
+  <a href="https://dungeon.familie-zink.org/"><b>▶ Play now - open it in your browser, or download the standalone file on the title screen</b></a><br>
   <a href="BESTIARY.md">Bestiary</a> · <a href="INSTALL.md">Run your own server</a> · <a href="DESIGN.md">Design notes</a>
 </p>
 
@@ -122,8 +122,9 @@ caves, rival masters, and me, telling you the story. With tea.
 
 ## How to play
 
-1. **Download [`play/DungeonCraft.html`](play/DungeonCraft.html)** and open it in your browser. That's all.
-   It runs offline, on desktop and on phones (touch controls switch on by themselves).
+1. **Open the game online**: <https://dungeon.familie-zink.org/>. It runs on desktop and on phones (touch controls switch on by themselves).
+   Logged-in players can download the whole game as one HTML file from the title screen (*Download Standalone*);
+   it then runs offline, and downloaded savegame files load there too.
 2. Or **run your own server** with Docker - with user accounts, savegames on the server and the game as an
    installable app: see **[INSTALL.md](INSTALL.md)**.