Lights-out logic puzzle
Light Grid
A free switch puzzle with five solvable circuits. Every press flips a window and its neighbors. Leave the whole grid dark in as few turns as you can.
FREE MATCH-THREE PUZZLE
Gem Switch
A free match-three score puzzle with 24 moves. Swap neighboring gems, set off cascades and try to earn 4,200 points before your moves run out.
Play Gem Switch ↗Free in your browser · No download · No account
How to play Gem Switch
Select a gem and then an adjacent gem to swap them. Make a row or column of three or more. Invalid swaps are free. Cascades multiply points. Arrows move the cursor; Space or Enter selects. Earn 4,200 points in 24 moves.
A good first strategy
Look near the bottom when several swaps are possible. Moving lower gems changes more of the board above them and can create a useful cascade.
The challenge and the score
Reach 4,200 points within 24 moves. The shared leaderboard ranks the five highest point totals. An ended attempt can earn points even when you have not completed the whole challenge.
You can leave a public name of one to six characters if your score qualifies. You do not need an account to play or to leave a score.
Another little challenge
Sequence memory game
Echo Keys
A free visual memory game with four big pads. Watch the growing phrase and repeat it with touch or A, S, D and F. Clear twelve rounds before your third mistake.
Sliding number puzzle
Number Slide
A free sliding-number puzzle with three-by-three and four-by-four boards. Move tiles into the gap until the numbers read in order. Every board is scrambled by legal moves, so every board can be solved.