fix sprite orientation

Kav

@@ -1 +1 @@
-Subproject commit 7f986c546a3b508410b2daabb5deded55bb213ba
+Subproject commit c9a4e3581699ce3c1a03837be0a9c9492560a706

KavTest/KavTestGame.cs

@@ -251,7 +251,7 @@ namespace KavTest
             ));
 
             WorldBuilder.SendMessage(new MeshSpriteSpawnMessage(
-                new Transform3D(new Vector3(3, 0, 11), Quaternion.Identity, Vector3.One),
+                new Transform3D(new Vector3(3, 0, 11), Quaternion.CreateFromAxisAngle(Vector3.Up, (float)System.Math.PI), Vector3.One),
                 mushroomGuyMeshSprite
             ));