diff --git a/home/scripts/noita-helper.sh b/home/scripts/noita-helper.sh
index c08886d..cd377da 100644
--- a/home/scripts/noita-helper.sh
+++ b/home/scripts/noita-helper.sh
@@ -18,7 +18,7 @@ function start {
     restic restore "latest:$SAVE_DIR" --target "$SAVE_DIR"
 
     echo "Ready to play Noita!"
-    echo "Remember to unmount the tmpfs after playing:"
+    echo "Remember to run $0 stop when done."
 
     while true
     do
@@ -35,7 +35,11 @@ function stop {
     echo "Backup and unmount done..."
 }
 
-# Parse command line arguments
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 {start|stop}"
+    exit 1
+fi
+
 if [ "$1" == "start" ]; then
     start
 elif [ "$1" == "stop" ]; then