# Platformer extension demo

**URL:** https://forum.makecode.com/t/platformer-extension-demo/714
**Category:** Arcade
**Tags:** extension
**Created:** [October 29, 2019, 5:47pm UTC](https://forum.makecode.com/t/platformer-extension-demo/714 "2019-10-29T17:47:17Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![2ndClemens](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/2ndclemens/32/809_2.png) [@2ndClemens](https://forum.makecode.com/u/2ndClemens)
#### Post date: [July 5, 2020, 11:53pm UTC](https://forum.makecode.com/t/platformer-extension-demo/714/8 "2020-07-05T23:53:36Z")

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And this doesn’t work either, even in the beta editor:

This repository contains a MakeCode extension. To use it in MakeCode,

- open [https://arcade.makecode.com/](https://arcade.makecode.com/)
- click on **New Project**
- click on **Extensions** under the gearwheel menu
- search for the URL of this repository

So I wonder how to open the demo.

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_[View the full topic](https://forum.makecode.com/t/platformer-extension-demo/714)._