Is Online is a smart contract built on the Solana blockchain. Players get the chance to place bets on when other players will be offline. Bets are placed using Solana's native currency SOL.
Follow the installation guide on anchor's website, the project can be built with anchor build and tested with anchor test.
Short answer: You cant. While the smart contract is fully functional, it is not deployed.
Influence from Anchor's Tic-Tac-Toe game.