diff --git a/particle-viewer.md b/particle-viewer.md
index 4d230fe..42a7be6 100644
--- a/particle-viewer.md
+++ b/particle-viewer.md
@@ -15,3 +15,4 @@ Some particles are attracted by the mouse cursor or Naija or interact with the e
 * ___F9___ - Toggle an eel that will follow the mouse, and a black box rotating in a circle?
 * ___Left click___ - Enable particle spawn (either one-off or continuously, depending on the emitter). The particle emitter will stick to the (invisible) mouse cursor.
 * ___Right click___ - Disable particle spawn and kill all particles.
+* ___Esc___ - Close and go back to map