diff --git a/main.gd b/main.gd
index 6a1a7d5..0816bcb 100644
--- a/main.gd
+++ b/main.gd
@@ -43,9 +43,10 @@ func _input(event: InputEvent) -> void:
 	elif event.is_action_pressed("restart", true, true):
 		restart()
 
-# TODO:
+# TODO: make restart undoable?
 func restart():
-	pass
+	while hist.has_undo():
+		hist.undo()
 
 func step(move: Vector2i):
 	var pos := player.lpos