Mobile-Responsive Ludo Game Web App

I'm seeking an experienced frontend developer to create a lightweight, mobile-responsive Ludo game web app using pure HTML, JavaScript, and CSS — no frameworks.

Game Requirements:
- 2-player Ludo game
- Classic Mode with:
- Standard Ludo rules
- Custom game rules
- Power-ups or special abilities
- Timer Mode with:
- Auto-end when time expires
- Warnings before time ends
- Pausing the timer during specific events

Additional Requirements:
- Fully responsive and mobile-friendly
- The app will run inside an iframe
- Authentication handled via a token from a parent React.js app

Ideal Skills and Experience:
- Strong proficiency in HTML, JavaScript, and CSS
- Experience in developing mobile-responsive web apps
- Knowledge of game development principles
- Familiarity with iframe integration and token-based authentication

Please share your relevant experience and approach to this project.