slightly improved structure and added a few more elements

src/main.rs

@@ -1,4 +1,5 @@
 use osui::{
+    element::input::{Input, InputUpdateEvent},
     events::EventManager,
     extensions::{keypress::KeyPressExtension, ExtensionManager},
     style::Transform,
@@ -11,9 +12,23 @@ fn main() {
     let mut events = EventManager::new();
     extensions.add(KeyPressExtension);
 
-    screen
-        .draw("Hello, World".to_string())
-        .component(Transform::center());
+    let widget = screen.draw(Input::new()).component(Transform::center());
+
+    let input_event = widget
+        .0
+        .as_any()
+        .downcast_ref::<Input>()
+        .unwrap()
+        .get_event();
+
+    input_event
+        .lock()
+        .unwrap()
+        .on(|event: Box<InputUpdateEvent>| {
+            if event.0 == "quit" {
+                std::process::exit(0)
+            }
+        });
 
     screen.run(&mut events, &mut extensions).unwrap();
 }