diff --git a/src/Game.tsx b/src/Game.tsx
index f9bbb10..afd848a 100644
--- a/src/Game.tsx
+++ b/src/Game.tsx
@@ -96,6 +96,9 @@ function Game(props: GameProps) {
       if (!e.ctrlKey && !e.metaKey) {
         onKey(e.key);
       }
+      if (e.key === "Backspace") {
+        e.preventDefault();
+      }
     };
     document.addEventListener("keydown", onKeyDown);
     return () => {