diff --git a/README.md b/README.md
index 1a14289..4977e17 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ there's a demo video at `/assets/demo_video.webm`.
 - QWEASD: paint with RGBYCM colors, respectively.
 - ZX: paint with background colors.
 - CV: paint with black and white.
+- G: create grass.
 - space: create box.
 - backspace: delete/clear/empty tiles to your left and right, and where you're standing.