Online multi player game

Copy from : http://slither.io/

- Play on browser
- Skin choosing
- Play with mouse and keyboard (PC) and left / right button (mobile)
- Scores and rank saved
- Multi players game, not single player (prefer nodejs game server)

Please estimate budget and timeline
We provide nothing like animation / graphic etc. You can develope the most core engine for it

Prefer technology : Unity 3D