Turn the tiles, connect the wires, and light up a whole town.
HOW IT WORKS
Every board starts dark. Tap a tile to turn it. When a wire from a battery reaches a bulb, the bulb glows. Light them all to finish the level.
COLOR CURRENTS
Soon a blue battery joins the yellow one. Yellow bulbs need yellow, blue bulbs need blue, and green bulbs need both at once: yellow from one side, blue from the other. Keep the wires apart and let the colors meet only where a green bulb is waiting.
LIGHT UP THE TOWN
Every level you solve turns on a window in town. Light ten and the whole street glows, lamps and all, and a new street is waiting.
FREE TO PLAY, NO ADS
The first 42 levels and the daily puzzle are free forever, with 3 free hints every day. Spark Premium is 4.99 USD a month, cancel anytime. It opens every street after level 42 and gives you unlimited hints. No ads, ever.
CALM, NOT RUSHED
No timers and no lives. Take your time, turn tiles until the path feels right, and enjoy the little chime as each bulb comes on.
A NEW PUZZLE EVERY DAY
The daily puzzle is the same board for everyone that day. Solve it to keep your streak going.
GROWS WITH YOU
The first levels teach the idea in a few taps. Boards grow from 3x3 to 7x9 as you go, and every level always has a solution.
CLEAN AND FRIENDLY
A light, simple design with soft sounds and nothing in the way. No ads, no account, and it plays offline.
Spark collects no personal data. Your progress stays on your phone.
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Turn the wires, mix colored currents, and light up a whole town.