diff --git a/assets/blender_assets.cats.txt b/assets/blender_assets.cats.txt
new file mode 100644
index 0000000..21c5a7d
--- /dev/null
+++ b/assets/blender_assets.cats.txt
@@ -0,0 +1,9 @@
+# This is an Asset Catalog Definition file for Blender.
+#
+# Empty lines and lines starting with `#` will be ignored.
+# The first non-ignored line should be the version indicator.
+# Other lines are of the format "UUID:catalog/path/for/assets:simple catalog name"
+
+VERSION 1
+
+a8867233-bda2-447a-a422-11e748fecd71:worlds:worlds
diff --git a/assets/darkworld.blend b/assets/worlds/darkworld.blend
similarity index 100%
rename from assets/darkworld.blend
rename to assets/worlds/darkworld.blend