diff --git a/README.md b/README.md
index d17042f..4437720 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Each experiment lives in its own isolated repository and gets listed here via [`
 
 3. Publish it to the registry:
    ```sh
-   joyco lab
+   joyco lab create
    ```
    This opens a PR adding your experiment to `experiments.json`.
 
@@ -33,7 +33,7 @@ Each entry in `experiments.json` follows this shape:
 | `repo`         | `string`   | no       | Source repository URL                    |
 | `template`     | `string`   | no      | Template used (`3d` \| `motion`)         |
 | `tags`         | `string[]` | no       | Freeform tags for filtering              |
-| `previewImage` | `string`   | no       | URL to a preview/thumbnail image         |
+| `hasControls`  | `boolean`  | no       | Whether the experiment exposes controls   |
 | `date`         | `string`   | yes      | Publication date (`YYYY-MM-DD`)          |
 
 The full JSON Schema is in [`schema.json`](./schema.json).
diff --git a/experiments.json b/experiments.json
index 5fc3692..3769fc1 100644
--- a/experiments.json
+++ b/experiments.json
@@ -19,6 +19,7 @@
         "pattern",
         "post-processing"
       ],
+      "hasControls": true,
       "date": "2026-03-12"
     },
     {
@@ -38,6 +39,7 @@
         "typography",
         "webgl"
       ],
+      "hasControls": false,
       "date": "2026-03-12"
     },
     {
@@ -58,6 +60,7 @@
         "webgl",
         "creative tools"
       ],
+      "hasControls": true,
       "date": "2026-03-12"
     },
     {
@@ -72,6 +75,7 @@
         "three.js",
         "susano"
       ],
+      "hasControls": false,
       "date": "2026-03-11"
     },
     {
@@ -84,6 +88,7 @@
       "tags": [
         "webgl"
       ],
+      "hasControls": true,
       "date": "2026-03-15"
     }
   ]
diff --git a/schema.json b/schema.json
index 94b39a5..ea92cce 100644
--- a/schema.json
+++ b/schema.json
@@ -45,10 +45,9 @@
             "items": { "type": "string" },
             "description": "Freeform tags for filtering"
           },
-          "previewImage": {
-            "type": "string",
-            "format": "uri",
-            "description": "URL to a preview/thumbnail image"
+          "hasControls": {
+            "type": "boolean",
+            "description": "Whether the experiment exposes interactive controls"
           },
           "date": {
             "type": "string",