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hardMachine Coding

Build the Snake Game

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01

Understand the problem

Build the classic snake game on a grid with keyboard controls.

ReactGameKeyboard
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

Solve in

Building the Snake Game in React

Mental model: The snake is an array of {x,y} cells; the head is index 0. Each tick you prepend a new head in the current direction and pop the tail — unless you ate food, in which case you keep the tail (grow). Direction lives in a ref so the keydown handler always reads the

Solution ready — 2 min read

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04

React solution

Complete solutionRun Playground
import React from 'react';
import SnakeGame from './src/SnakeGame';

export default function App() {
  return (
    <div style={{ fontFamily: 'sans-serif', padding: 20 }}>
      <h1>Snake Demo</h1>
      <p style={{ color: '#666' }}>Use arrow keys (click the board first).</p>
      <SnakeGame />
    </div>
  );
}
05

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Transmission complete // awaiting log

KEEP THE
STREAK ALIVE.

Dossier 84 of 87 decoded in the Frontend Machine Coding track. One more won't hurt.

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