add some ascii levels

README.md

@@ -11,6 +11,7 @@ timestamps in solutions and blueprints
 multiple input/output sets
 undo/redo
 tooltips
+show level info in editor
 lock tile types for early levels to make it less overwhelming
 display tool variant more clearly (it's not obvious there are more states)
 make marble movement more consistent (`>o o<` depends on internal marble order)
@@ -21,16 +22,18 @@ blueprint rotation?
 ```
 - assets/
 - levels/
-  - 00_zeroes.json
-  - 01_cat.json
-  - 02_parse.json
-  - 99_sandbox.json
+  - 01_intro/
+    - 01_output.json
+    - 02_cat.json
+  - 02_lists/
+    - 02_parse.json
+  - sandbox.json
 - user/
   - solutions/
-    - 00_zeroes/
+    - output/
       - solution_0.json
       - solution_1.json
-    - 01_cat/
+    - copy_input/
       - solution_0.json
       - solution_3.json
   - blueprints
@@ -41,7 +44,7 @@ blueprint rotation?
 `00_zeroes.json`
 ```json
 {
-  "id": "00_zeroes",
+  "id": "output",
   "sortorder": 5,
   "name": "Zeroes",
   "description": "learn how to output data",