Ether Coin Flip allows 2 players to gamble Ethereum. You can find the full tutorial for this Dapp here.
Working example is running on the Rinkeby testnet and can be found here.
The game works like this.
-Player 1 sends Ethereum to the new coin flip function
-Smart contract generates a coin flip ID
-Player 2 sends Ethereum to the end coin flip function & passes in the coin flip ID
-Smart contract randomly generates a winner
-Smart contract sends all the Ethereum to the winner
This smart contract using chainlink's RVF to secure randomness.