Jellysweeper: Jellyfish Puzzle Game

Puzzle Math

Developer: Inferno Wanderer Games

Published: 2025-03-18

Updated: 2026-06-10

Runs in your browser — no download.

Reviews

Jellysweeper offers a polished take on classic puzzle logic with a friendly theme. The gameplay is smooth and intuitive, making it easy to start but hard to master. Each board requires careful deduction, providing good replay value. The time trial mode adds motivation for returning players. It is a solid choice for daily brain training.

Description

Game Introduction

Jellysweeper is a casual puzzle game that combines classic logic deduction with a cheerful underwater theme. The core objective is to uncover all safe tiles on a grid while avoiding hidden jellyfish. Each safe tile reveals a number indicating how many jellyfish are in the eight surrounding squares. Players use these clues to mark where jellyfish are hidden. The game ends if a jellyfish is clicked, and success is achieved when all safe tiles are opened and only flagged jellyfish remain. This blend of deduction and caution creates a satisfying puzzle experience suitable for all ages.

How to Play

To play Jellysweeper, start by clicking any tile on the grid. If a number appears, the tile is safe and tells you how many jellyfish are nearby. Use these numbers to figure out where jellyfish are hidden. Right-click or use the mark button to place a flag on tiles you suspect contain a jellyfish. This helps you keep track. Continue uncovering safe tiles and flagging jellyfish until only ten flags remain. The board clears when all other tiles are open. The game rewards careful thinking and pattern recognition.

Game Features

Jellysweeper offers engaging gameplay that challenges your logic skills. Smart assistance helps avoid accidental clicks on jellyfish. Full player control lets you choose your own strategy. A time trial mode adds extra challenge for speed solvers. The interface is clean and family-safe, with no inappropriate content. The game is based on math and deduction, making it a great choice for puzzle enthusiasts.

Tips for Success

Start by clicking in the center of the grid to open a large area. Use the number clues to identify safe tiles and potential jellyfish locations. Mark tiles you are unsure about with flags to avoid accidental clicks. Practice pattern recognition to quickly identify common jellyfish arrangements. Take your time and think through each move carefully. The more you play, the better you will become at deducing safe paths.

Compatibility

💻 Desktop | 📱 Mobile | 📟 Tablet – All supported · Best with Chrome or Safari

FAQ

Is Jellysweeper free to play?

Based on the game type and tags, Jellysweeper is likely free to play online. Many casual puzzle games of this kind are offered at no cost, though some may include optional in-game purchases or ads. Check the specific platform for details.

Can I play Jellysweeper on mobile devices?

As an online puzzle game, Jellysweeper may be playable on mobile devices through a web browser. Many casual puzzle games are designed to be responsive. However, for the best experience, check the game's website or app store listing for device compatibility.

Does Jellysweeper have different difficulty levels?

The game description does not specify difficulty levels, but many puzzle games of this type offer varying grid sizes or numbers of hidden jellyfish to adjust challenge. It is possible that Jellysweeper includes options for beginners and advanced players.

What happens if I click on a jellyfish?

If you click on a jellyfish, the game ends immediately. This is a standard rule in this type of puzzle game. The goal is to avoid clicking on any jellyfish and instead flag them all while uncovering all safe tiles.

Is there a leaderboard or scoring system in Jellysweeper?

The provided information does not mention a leaderboard or scoring system. However, the time trial mode suggests that speed may be tracked. Some puzzle games include high scores or completion times, but this is not confirmed for Jellysweeper.

Can I undo a move or restart a game in Jellysweeper?

Typically, puzzle games like Jellysweeper allow you to restart a game at any time. Undoing a move may not be available, as the game relies on careful deduction. Check the game interface for a restart button or option to start a new board.