fixed bootstrapping and asset handling

standalone-openfl-app/src/Main.hx

@@ -1,20 +1,22 @@
 package;
 
-import openfl.utils.AssetType;
 import openfl.display.Sprite;
-import openfl.Assets;
+import openfl.Lib;
+import sys.FileSystem;
+import Assets;
 
 class Main extends Sprite {
     public function new() {
         super();
-        
+
+        Lib.current.addChild(this);
+
         // Draw background to verify app is running
         graphics.beginFill(0x3498db, 1);
         graphics.drawRect(0, 0, 800, 600);
         graphics.endFill();
 
-        var testAsset = Assets.getText("assets/data/img/placeholder.txt");
-        trace(testAsset);
-
+        var testAsset = openfl.Assets.getText("img/placeholder.txt");
+        trace("Successfully loaded asset: " + testAsset);
     }
 }