diff --git a/README.md b/README.md
index 1616a43..387574f 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,9 @@ implementation, to be found in the interpreter files. This could also be used as
 a drop-in replacement for the compiler, by changing the appropriate line in
 `main.cpp`.
 
+> [!Note]
+> Running `curly` without arguments, it will show the solution to the online puzzle. When run with file arguments, it will try to parse those files as Krul sources and run them.
+
 ## Building
 
 Build using: