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description: This section is for pre-release users / developers
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# Sandbox environment

{% hint style="info" %}
The Sandbox environment is available here: [https://sandbox.app.chll.gg/](https://sandbox.app.chll.gg/)
{% endhint %}

## Sandbox environment

This environment is meant for video game developers and the pre-release community. Please be advised, that the sandbox environment runs on Polygon testnet (MUMBAI) and should be used for test purposes only.

### Video game developers

Please use the sandbox environment to understand how games communicate with CHLL.GG infrastructure. Use the 0xDino game to test communication patterns.

### Pre-release community

First of all, thank you for your time committed to make CHLL.GGa better product! Join 0xDino challenges during the Summer Season and share your feedback!

#### Sharing feedback / reporting bugs

Please use the "Leave feedback" button on the right side of the website to share your feedback. Remember to leave your Telegram handle. We will reward contributors after the release of MVP and TGE later this year (2023).

#### 🦖 OxDino Summer Season! 🦖

Join our OxDino Summer Season to win NFT and Token rewards on #POLYGON.

1️⃣ For the next 10 weeks (starting mid-July 2023), you will be able to participate in the 0xDino challenge at CHLL.GG each week.

2️⃣ The best performers will receive #WASD virtual keyboard NFTs (WASD.CHLL.GG) after each challenge. You can collect up to 10 NFTs per wallet if you participate in all 10 challenges.

3️⃣ The best performers from the entire season's challenges will receive additional token rewards in early October. The exact date will be announced later.

💻 To join, look for the "Summer Season" challenges at CHLL.GG.

‼️‼️‼️ Please share your feedback (bugs, ideas, Easter eggs) regarding CHLL.GG using the "Leave feedback" button ‼️‼️‼️

**You need a Metamask wallet to participate**. The CHLL.GG sandbox runs on the Polygon testnet MUMBAI! Metamask will ask you to switch to this network.

## Join the community

Please join our Telegram group and Discord server.

* Telegram group: [https://t.me/+vwgNQvwMAokyOGVk](https://t.me/+vwgNQvwMAokyOGVk)
* Discord server: [https://discord.com/invite/UNdmNPCgEH](https://discord.com/invite/UNdmNPCgEH)

