Premium

React Snake Game (Grid + Food + Collision)

By FrontendAtlas Team · Updated Feb 9, 2026

Build a Snake game in React using a grid board. Support keyboard controls, food spawning, score updates, and game-over handling for wall/body collisions.

Render a fixed-size board (for example 14×14) with snake body and food…
Move the snake using Arrow keys (optionally WASD).

What you’ll build / What this tests

This premium react coding focuses on React Snake Game (Grid + Food + Collision). You’ll apply react and state thinking with hard level constraints. The prompt emphasizes Build a Snake game in React using a grid board. Support keyboard controls, food spawning, score….

Learning goals

Translate the prompt into a clear react API signature and return shape.
Apply react, state, timers techniques to implement react snake game (grid + food + collision).
Handle hard edge cases without sacrificing readability.
Reason about time/space complexity and trade-offs in react.

Key decisions to discuss

Define the exact input/output contract before coding.
Prioritize predictable edge-case handling over micro-optimizations.

Evaluation rubric

Correctness: covers required behaviors and edge cases.
Clarity: readable structure and predictable control flow.
Complexity: avoids unnecessary work for large inputs.
API discipline: no mutation of inputs; returns expected shape.
Testability: solution is easy to unit test.

Constraints / Requirements

Render a fixed-size board (for example 14×14) with snake body and food cells.
Move the snake using Arrow keys (optionally WASD).
Run game ticks on an interval while the game is running.
Eating food should grow the snake and increment score.
Colliding with walls or snake body should end the game.
Provide Start/Pause and Reset controls.
Expose score and current snake length in the UI.
Keep keyboard interactions stable (no reverse-direction bug).
Initial state shows a short snake, one food cell, and score 0.
Press Start to begin movement; snake advances one cell per tick.

Mini snippet (usage only)

// Example usage
const input = /* react snake game (grid + food + collision) input */;
const result = solve(input);
console.log(result);

// Edge case check
const empty = input ?? null;
const fallback = solve(input);
console.log(fallback);

// Expected: describe output shape, not the implementation
// (no solution code in preview)

Common pitfalls

Mutating inputs instead of returning a new value.
Skipping edge cases like empty input, duplicates, or nulls.
Overlooking time complexity for large inputs.