Jessmac

Problem Statement

Snakes & Ladders Onchain is a multiplayer web3 board game built on the Monad Testnet, combining the fun of a childhood classic with the transparency and fairness of blockchain. Players connect their wallets, join or create game rooms via Multisynq, and play in real-time with on-chain dice rolls that ensure every move is provably fair.Each dice roll triggers a transaction using MON, and the smart contract validates outcomes directly on the network. If the blockchain transaction fails or gas runs out, the game seamlessly falls back to an off-chain simulation — keeping gameplay uninterrupted while maintaining transparency.The project demonstrates how traditional games can integrate provable randomness, decentralized state synchronization, and crypto microtransactions in a fun, user-friendly way.

Solution

This project was built using a combination of Web3, Multisynq, and Monad smart contracts.Frontend: HTML, CSS, and JavaScript power the interactive board and UI, hosted at monad.jessmac.me .Wallet integration: MetaMask and Ethers.js handle wallet connection, MON balance display, and transaction execution.Smart contract: A Solidity contract deployed on Monad Testnet manages the dice-roll randomness, player turns, and rewards.Multisynq: Enables multiplayer synchronization, room management, and state updates across connected players.Backend / Sync logic: Uses Multisynq’s real-time messaging layer to coordinate moves instantly without central servers.Hacky bits:Gasless “demo mode” fallback for offline play to avoid transaction delays.Hybrid randomness — on-chain provable rolls with off-chain fallback when needed.Dynamic UI updates based on live blockchain state.By merging on-chain fairness with off-chain speed, this project proves that web3 games can be fun, fair, and frictionless.