semi working

src/main.rs

@@ -1,12 +1,26 @@
 use minifb::{Window, WindowOptions};
-use osgui::{elements::Rect, App};
+use osgui::{
+    elements::Rect,
+    extensions::velocity::{Velocity, VelocityExtension},
+    Screen,
+};
 
 fn main() {
-    let window = Window::new("minifb example", 500, 500, WindowOptions::default()).unwrap();
+    let window = Window::new(
+        "minifb example",
+        500,
+        500,
+        WindowOptions {
+            resize: false,
+            ..Default::default()
+        },
+    )
+    .unwrap();
 
-    let mut app = App::new(window);
+    let mut app = Screen::new(window);
+    app.extension(VelocityExtension);
 
-    app.element(Rect);
+    app.draw(Rect).component(Velocity(100, 0));
 
-    app.run();
+    app.run().unwrap();
 }