ONE SPARK. A WHOLE SHOW.

The harbor is waiting for its fireworks. You have a box of fuses, three rockets, and one chance to set everything in motion.

Build a connected route, turn the pieces into place, then strike the spark. Watch it split at junctions, cross the water, and carry your plan all the way to the sky. If the chain breaks, keep your layout, find the missing connection, and try again.

SMALL SPARK, BIGGER IDEAS

• 30 levels that grow from compact first steps into layered routing puzzles.

• Limited fuses: make every piece count and earn up to three firework rewards for an efficient solution.

• Colors, crossings and timing: match rocket colors, keep bridge lanes separate, and synchronize your launches.

• Mechanical surprises: gates, distant relays, water jumps, movable rafts, selectors and rocket-triggered barriers.

• A lantern-lit harbor, animated sparks and fireworks, and a gentle instrumental soundtrack.

HOW TO PLAY

1. Choose a fuse from the tray, then click an empty tile to place it.

2. Use ROTATE or right-click before placing to change its direction.

3. Use REMOVE, then click a placed fuse to return it to your supply.

4. Press IGNITE when the route is ready. One spark must reach every rocket.

5. RETRY / EDIT ROUTE keeps your layout so you can adjust it.

The in-game HOW TO PLAY pages explain the special pieces. Take your time while building; timing puzzles measure the reaction after ignition.

Play in a desktop browser with a mouse. Click inside the game if audio has not started. The speaker icon toggles music and effects. Progress and sound preferences are saved locally in your browser.

MADE FOR DEFOLD GAME JAM 2026

Theme: Chain Reaction.

In FUSE, a single spark becomes a network of burning paths. Each branch can launch a rocket, open a barrier or feed another mechanism. Later puzzles ask you to make those events work together.

Built with Defold 1.13.2.

CREDITS & AI DISCLOSURE

AI was used for art, programming, level design and debugging. 

Fonts: Barlow Condensed by The Barlow Project Authors and Lilita One by Juan Montoreano, both under the SIL Open Font License 1.1.

Thanks for playing! Tell me which level made you stop and think, or where your chain went wrong.