diff --git a/README.md b/README.md
index efbd593..de38ea8 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 Simple choice game.
 
+## Demo
+
+https://ab.21x9.org
+
 ## Installation
 
 0. Install `python3` (and `pip` if needed)