Fireflies: Light Up Puzzle

More than 1,400 calm logic puzzles, each with exactly one solution. Endless play that grows with you, a fresh daily puzzle, and a streak to keep. Works offline.

Looking for a quiet puzzle to end the day with? Welcome to Fireflies, a calm, atmospheric light-up logic puzzle set in a night forest.

Simple Rules, Deep Logic Place fireflies on the grid so that every empty cell is lit. • Light the Way: A firefly lights its whole row and column until a tree blocks the way. • Count the Trees: Numbered trees tell you exactly how many fireflies sit next to them. • Keep Your Distance: No two fireflies may light each other. Every puzzle has exactly one solution, so pure logic always gets you there.

Key Features • Endless Play: Puzzles flow one into the next — gentle at first, sharper as you improve. • Four Difficulty Levels: From relaxing to properly tough, on grids from 7×7 up to 10×10. • Daily Puzzle: A new puzzle every day, and a streak to keep. Come back each day and watch it grow. • Gentle Feedback: Mistakes show up right away, softly — a firefly flickers and fades. You have three lives per puzzle. • Hints: Stuck? Use a hint to reveal a cell. • Play Anywhere: Every puzzle is built in, so no connection is needed.

A Calm Corner of Your Day There's no clock in endless play and no rush. Just a dark forest, a grid, and fireflies waking up one by one until the whole board glows.

Free to Play Fireflies is free to play and supported by ads. Optional short videos earn you extra hints or let you continue a puzzle. Rather skip the full-screen ads? An optional one-time purchase removes them, and optional hint and life packs are available too.

Ready to light up the forest? Download Fireflies — quiet, warm, and unhurried, a little glow at the end of the day.