diff --git a/src/main.rs b/src/main.rs
index fd48ccc..4980190 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -77,11 +77,21 @@ fn setup(
 fn handle_input(
     keyboard_input: Res<ButtonInput<KeyCode>>,
     mut settings: ResMut<settings::Settings>,
-    mut app_exit_events: ResMut<Events<bevy::app::AppExit>>
+    mut app_exit_events: ResMut<Events<bevy::app::AppExit>>,
+    mut windows: Query<&mut Window, With<PrimaryWindow>>,
 ) {
     if keyboard_input.pressed(settings.key_exit) {
         app_exit_events.send(bevy::app::AppExit);
     }
+    if keyboard_input.just_pressed(settings.key_fullscreen) {
+        for mut window in &mut windows {
+            window.mode = if window.mode == WindowMode::Windowed {
+                WindowMode::BorderlessFullscreen
+            } else {
+                WindowMode::Windowed
+            }
+        }
+    }
     if keyboard_input.just_pressed(settings.key_restart) {
         settings.reset();
     }