Build Responsive Color Prediction Website

I’m ready to commission a full-stack build of a responsive color-prediction website. The core flow is straightforward: users land on the site, register quickly with their phone number, deposit funds through a seamless UPI gateway, play the color-prediction game, and withdraw their winnings just as easily.

Key features I expect:

• Registration & login strictly through OTP-verified phone numbers.
• A clean, mobile-first interface for the actual prediction game—fast, lightweight, and compatible with all modern browsers.
• Instant deposit and withdrawal handling via UPI; the codebase should be organised so that adding PayPal, Stripe, or crypto later will be painless.
• A role-based admin panel with three levels of access—Admin, Moderator, and User—each seeing only the controls relevant to them. Security, audit logging, and intuitive charts for real-time game stats are all essential.

Tech stack is flexible, but I lean toward React or Vue on the front end and a Node.js or Laravel back end with a robust relational database. Whichever stack you choose, make sure it supports modular growth and can be containerised (Docker) for smoother deployment.

Acceptance criteria
1. Fully responsive UI passes Google Lighthouse mobile audits (>90).
2. OTP registration flow completes within 5 seconds round-trip under normal 4G conditions.
3. Deposits and withdrawals processed end-to-end through UPI sandbox during testing and live environment on launch.
4. Role permissions verified: Admin (full control), Moderator (user management and game settings), User (game play & wallet only).
5. Source code delivered via Git, with a README covering setup, environment variables, and deployment steps.

If this matches your expertise and you can hit these milestones, let’s get started.