diff --git a/.github/workflows/start-site.yml b/.github/workflows/start-site.yml
index bb906f42..1af3a78b 100644
--- a/.github/workflows/start-site.yml
+++ b/.github/workflows/start-site.yml
@@ -31,6 +31,7 @@ jobs:
       - run: cp ./scratch-microbit-more/site/index.html ./scratch-gui/build/index.html
       - run: cp ./scratch-microbit-more/site/favicon.ico ./scratch-gui/build/static/favicon.ico
       - run: cp -r ./scratch-microbit-more/dist ./scratch-gui/build/dist
+      - run: cp ./scratch-microbit-more/site/donation.html ./scratch-gui/build/donation.html
       - uses: peaceiris/actions-gh-pages@v3
         with:
           deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
diff --git a/README.md b/README.md
index bf096f69..4e0e70be 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,110 @@
-# mbit-more
-Another micro:bit extension for Scratch3. 
+<h1 align="center">scratch-microbit-more</h1>
+<p>
+  <img alt="Version" src="https://img.shields.io/badge/version-0.5.0-blue.svg?cacheSeconds=2592000" />
+  <a href="https://yokobond.github.io/scratch-microbit-more" target="_blank">
+    <img alt="Documentation" src="https://img.shields.io/badge/documentation-yes-brightgreen.svg" />
+  </a>
+  <a href="https://github.com/yokobond/scratch-microbit-more/graphs/commit-activity" target="_blank">
+    <img alt="Maintenance" src="https://img.shields.io/badge/Maintained%3F-yes-green.svg" />
+  </a>
+  <a href="https://github.com/yokobond/scratch-microbit-more/blob/trunk/LICENSE" target="_blank">
+    <img alt="License: MIT" src="https://img.shields.io/github/license/yokobond/scratch-microbit-more" />
+  </a>
+</p>
+
+> Full-functional extension of micro:bit for Scratch3
+
+### ✨ Open [Microbit More Web-App](https://yokobond.github.io/scratch-microbit-more)
+
+### 🏠 [Homepage](https://lab.yengawa.com/project/scratch-microbit-more/)
+
+## Setup Development Environment
+
+Download the Scratch3 repositories according to the supporsed directory configuration.
+
+```
+.
+|-- scratch-microbit-more
+|-- scratch-vm
+|-- scratch-gui
+```
+
+Install node modules and setup to use local repo for development.
+
+```sh
+cd ./scratch-microbit-more
+npm install
+npm run setup:local
+npm run install:local
+```
+
+## Install into Scratch3
+
+To install this extention into your selfbuild Scratch3, execute `scripts/install.js` with options as follows.
+
+```sh
+node ./scripts/install.js --gui="../scratch-gui" --vm="../scratch-gui/node_modules/scratch-vm" --url="https://yokobond.github.io/scratch-microbit-more/dist/microbitMore.mjs"
+```
+
+- --gui : location of scratch-gui from current dir.
+- --vm : location of scratch-vm form current dir.
+- --url : URL to get its module as a lodable extension for Xcratch.
+
+**CAUTION:** This script will change '`extension default`' in `scratch-gui/src/lib/libraries/extensions/index.jsx` as follows.
+
+change from the original code
+
+```js
+export default [...];
+```
+
+to
+
+```js
+const extensions = [...];
+export default extensions;
+```
+
+It may break installation mechanism of the other extensions.
+
+
+## Xcratch Module Building
+
+Build module as loadable extension for [Xcratch](https://github.com/yokobond/xcratch).
+
+```sh
+node ./scripts/build.js --name=microbitMore --block="./src/block" --entry="./src/entry" --vm="../scratch-vm" --gui="../scratch-gui" --output="./dist"
+```
+
+- --name: name of the module file (without '.mjs').
+- --block : location of block files from current dir.
+- --entry : location of entry files from current dir.
+- --gui : location of scratch-gui from current dir.
+- --vm : location of scratch-vm form current dir.
+- --output : location to save module form current dir.
+
+## Author
+
+👤 **Koji Yokokawa**
+
+* Website: http://www.yengawa.com/
+* Github: [@yokobond](https://github.com/yokobond)
+
+## 🤝 Contributing
+
+Contributions, issues and feature requests are welcome!<br />Feel free to check [issues page](https://github.com/yokobond/scratch-microbit-more/issues). You can also take a look at the [contributing guide](https://github.com/yokobond/scratch-microbit-more/blob/master/CONTRIBUTING.md).
+
+## Show your support
+
+Give a ⭐️ if this project helped you!
+
+[Donate](https://yokobond.github.io/scratch-microbit-more/donation.html) if this project is worth for you.
+
+
+## 📝 License
+
+Copyright © 2020 [Koji Yokokawa](https://github.com/yokobond).<br />
+This project is [MIT](https://github.com/yokobond/scratch-microbit-more/blob/trunk/LICENSE) licensed.
+
+***
+_This README was generated with ❤️ by [readme-md-generator](https://github.com/kefranabg/readme-md-generator)_
\ No newline at end of file
diff --git a/site/donation.html b/site/donation.html
new file mode 100644
index 00000000..4be0aa35
--- /dev/null
+++ b/site/donation.html
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <!-- Ensures optimal rendering on mobile devices. -->
+  <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <!-- Optimal Internet Explorer compatibility -->
+  <style>
+    @media screen and (max-width: 400px) {
+      #paypal-button-container {
+        width: 100%;
+      }
+    }
+
+    @media screen and (min-width: 400px) {
+      #paypal-button-container {
+        width: 250px;
+      }
+    }
+  </style>
+</head>
+
+<body>
+  <div id="smart-button-container">
+    <div>
+      <h1>Donation for MicrobitMore</h1>
+      <p>Please <strong>purchase</strong> it for donation to <a href="https://github.com/yokobond/scratch-microbit-more/" target="_blank">MicrobitMore</a>
+        project.</p>
+      <div style="margin-bottom: 10px;">
+        <label>Set your own price ($1~): $ </label><input type="number" id="amount" required maxlength="4" size="4" value="10"> USD
+      </div>
+      <div id="paypal-button-container"></div>
+    </div>
+  </div>
+  <script
+    src="https://www.paypal.com/sdk/js?client-id=AdG4OQmiRiyRrz1Iv1RD8Ssdbay4G0b-GFaTPZN2Xavs93ijuHjAx7SkKK6el_IidOwqOyNJaFQbVN75&currency=USD"
+    data-sdk-integration-source="button-factory"></script>
+  <script>
+    function initPayPalButton() {
+      paypal.Buttons({
+        style: {
+          shape: 'pill',
+          color: 'white',
+          layout: 'vertical',
+          label: 'paypal',
+          size: 'responsive'
+        },
+
+        createOrder: function (data, actions) {
+          var amt = document.getElementById("amount").value;
+          return actions.order.create({
+            purchase_units: [
+              {
+                "description": "Donation to MicrobitMore",
+                "amount": {
+                  "currency_code": "USD",
+                  "value": amt
+                }
+              }
+            ],
+            application_context: {
+              shipping_preference: 'NO_SHIPPING'
+            }
+          });
+        },
+
+        onApprove: function (data, actions) {
+          return actions.order.capture()
+            .then(function (details) {
+              alert('Donated to MicrobitMore by ' + details.payer.name.given_name + '!');
+            });
+        },
+
+        onError: function (err) {
+          console.log(err);
+        }
+      }).render('#paypal-button-container');
+    }
+    initPayPalButton();
+  </script>
+</body>
\ No newline at end of file