diff --git a/assets/oml.groovy b/assets/oml.groovy
new file mode 100644
index 0000000..3bcee2c
--- /dev/null
+++ b/assets/oml.groovy
@@ -0,0 +1,15 @@
+import me.stringdotjar.flixelgdx.Flixel
+import me.stringdotjar.polyverse.script.type.AnotherType
+
+class Sob extends AnotherType {
+
+  Sob() {
+    super('Sob')
+  }
+
+  @Override
+  void onWindowFocused() {
+    super.onWindowFocused()
+    Flixel.info("i hate [insert particular ethnicity here]")
+  }
+}
diff --git a/assets/test.groovy b/assets/test.groovy
index 0a291d2..fba075e 100644
--- a/assets/test.groovy
+++ b/assets/test.groovy
@@ -33,6 +33,12 @@ class TestScript extends SystemScript {
     super.onDispose()
     Flixel.info("TestClass", "Script has been disposed!")
   }
+
+  @Override
+  void onWindowFocused() {
+    super.onWindowFocused()
+    Flixel.info("i like em young")
+  }
 }
 
 class TestScreen extends FlixelScreen {
diff --git a/flixelgdx/src/main/java/me/stringdotjar/flixelgdx/FlixelGame.java b/flixelgdx/src/main/java/me/stringdotjar/flixelgdx/FlixelGame.java
index 36b8078..cfca1f4 100644
--- a/flixelgdx/src/main/java/me/stringdotjar/flixelgdx/FlixelGame.java
+++ b/flixelgdx/src/main/java/me/stringdotjar/flixelgdx/FlixelGame.java
@@ -99,6 +99,7 @@ public void create() {
 
   @Override
   public void resize(int width, int height) {
+    windowSize.set(width, height);
     viewport.update(width, height, true);
   }
 
@@ -109,10 +110,6 @@ public void render() {
 
     Flixel.Signals.preRender.dispatch(new RenderSignalData(delta));
 
-    if (Flixel.keyJustPressed(Input.Keys.F11)) {
-      toggleFullscreen();
-    }
-
     // Update and render the current screen that's active.
     ScreenUtils.clear(Color.BLACK);
     viewport.apply();
diff --git a/funkin/src/main/java/me/stringdotjar/funkin/FunkinGame.java b/funkin/src/main/java/me/stringdotjar/funkin/FunkinGame.java
index cfdce50..33ac973 100644
--- a/funkin/src/main/java/me/stringdotjar/funkin/FunkinGame.java
+++ b/funkin/src/main/java/me/stringdotjar/funkin/FunkinGame.java
@@ -1,5 +1,6 @@
 package me.stringdotjar.funkin;
 
+import com.badlogic.gdx.Input;
 import me.stringdotjar.flixelgdx.Flixel;
 import me.stringdotjar.flixelgdx.FlixelGame;
 import me.stringdotjar.flixelgdx.backend.FlixelPaths;
@@ -28,6 +29,11 @@ public void create() {
   @Override
   public void render() {
     super.render();
+
+    if (Flixel.keyJustPressed(Input.Keys.F11)) {
+      toggleFullscreen();
+    }
+
     Polyverse.forAllScripts(script -> script.onRender(Flixel.getDelta()));
   }
 
@@ -41,7 +47,7 @@ public void dispose() {
   public void onWindowFocused() {
     super.onWindowFocused();
     Flixel.setMasterVolume(lastVolume);
-    Polyverse.forEachScript(SystemScript.class, SystemScript::onWindowFocused);
+    Polyverse.forEachScriptSuccessor(SystemScript.class, SystemScript::onWindowFocused);
   }
 
   @Override
@@ -67,5 +73,6 @@ private void configurePolyverse() {
 
     Polyverse.registerScript(FlixelPaths.asset("test.groovy"));
     Polyverse.registerScript(FlixelPaths.asset("another_test.groovy"));
+    Polyverse.registerScript(FlixelPaths.asset("oml.groovy"));
   }
 }
diff --git a/polyverse/src/main/java/me/stringdotjar/polyverse/Polyverse.java b/polyverse/src/main/java/me/stringdotjar/polyverse/Polyverse.java
index a8383af..297105d 100644
--- a/polyverse/src/main/java/me/stringdotjar/polyverse/Polyverse.java
+++ b/polyverse/src/main/java/me/stringdotjar/polyverse/Polyverse.java
@@ -98,7 +98,7 @@ public static void registerScript(FileHandle handle) {
   }
 
   /**
-   * Executes an action for each script of a certain type, with error handling.
+   * Executes a function that pertains to a specific type for each script.
    *
    * @param type The class type of scripts to iterate over.
    * @param action The action to perform on each script.
@@ -107,6 +107,21 @@ public static <T extends Script> void forEachScript(Class<T> type, Consumer<T> a
     executeScriptList(getScripts(type), action);
   }
 
+  /**
+   * Executes a function for all scripts that are successors (subclasses or implementations) that are
+   * of a specific type.
+   *
+   * @param type The class type of scripts to iterate over, including its subtypes.
+   * @param action The function to perform on each script.
+   */
+  public static <T extends Script> void forEachScriptSuccessor(Class<T> type, Consumer<T> action) {
+    for (Class<? extends Script> scriptType : scripts.keySet()) {
+      if (type.isAssignableFrom(scriptType)) {
+        executeScriptList(getScripts(scriptType), action);
+      }
+    }
+  }
+
   /**
    * Executes an action for all scripts of all types, with error handling. Note that this function
    * is NOT recommended to be used frequently due to how generic it is. It's mainly intended for
diff --git a/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/AnotherType.java b/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/AnotherType.java
new file mode 100644
index 0000000..6e3e4fd
--- /dev/null
+++ b/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/AnotherType.java
@@ -0,0 +1,8 @@
+package me.stringdotjar.polyverse.script.type;
+
+public abstract class AnotherType extends SystemScript {
+
+  public AnotherType(String id) {
+    super(id);
+  }
+}
diff --git a/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/SystemScript.java b/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/SystemScript.java
index 1024e0e..0dd14fc 100644
--- a/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/SystemScript.java
+++ b/polyverse/src/main/java/me/stringdotjar/polyverse/script/type/SystemScript.java
@@ -14,4 +14,6 @@ public void onWindowUnfocused() {}
 
   /** Called when the game window is minimized. */
   public void onWindowMinimized(boolean iconified) {}
+
+  public void rawr() {}
 }