RE: connect four

The game SDK is automatically included when chatting on the Bot Libre website.
If you are embedding your bot on your own website then you need to include it,

<script type='text/javascript' src='https://www.botlibre.com/scripts/game-sdk.js'></script>

There is also the text version of the game that does not require the UI,

https://www.botlibre.com/script?id=38153861