One thing a turn
Step one square — up, down, left or right — or spend a wall. Never both, and never diagonally.
Free · Android · Four games
Two of you start at opposite ends of a board, each walking to where the other began. Every turn is one thing: a single step, or a wall dropped in their path. First one across wins. Two more games come with it, and all three climb the same rank.


Four games, one rank
Everything you play earns XP toward the same level and tier, from the first Bronze level to Grandmaster.

Draw lines to bring a pink ball and a blue ball together. Each line becomes a wooden plank the moment you lift your finger, and gravity does the rest. Ink never runs out — but three stars go to whoever uses least.
Sixty levels in six chapters

Blind sumo for four to eight. Everyone plans in secret, then every disc launches at once; knock the others off the platform, and the last one on wins. The platform shrinks every round.
Against bots, round one phone, or online

Draw one line from 1 through every square of the grid, passing the numbers in order, without crossing itself or a wall. Drag back to rub it out; your best time on each level is kept.
Sixty levels, from 4×4 to 8×8
120 games a matchup, two copies of the computer at full strength
Long enough to plan, short enough for a bus ride
Every wall gets used, so none of them is decoration
The rules, all of them
Step one square — up, down, left or right — or spend a wall. Never both, and never diagonally.
You both walk the same line in opposite directions, so every wall in their way is in yours. A turn spent on a wall is a turn not spent walking.
A wall may never leave either player without a route to the end they are walking to. The game refuses that placement and says why.
Undo takes back your last move. Against the computer it takes back its reply too, so it is your turn again.
Why it is not just a maze
Both players start on the middle column of opposite edges, and each one's goal is the row the other is standing on. The two shortest routes are one line of the board travelled in opposite directions — so there is no such thing as a wall that only inconveniences the other player.
That is what makes a wall a decision instead of a free move. And the pawn in front of you is the one obstacle that moves: if it blocks your step, you hop it.
On the phone
Not one image file, not one sound file. Every pawn, wall, plank, puck and chime is made as the game runs — which is why the whole thing is smaller than the last photo you sent anyone.




Ranks
Beat the computer and earn XP — more the harder you set it, a little even for a loss. XP makes levels, and levels make tiers. Pass and play earns nothing: either player could hand the other the win.
A win is worth 20 XP against the gentlest computer and 100 against the hardest. Every game you send is replayed by the server, with the game's own rules, before it counts — so a rank means what it says.
Play the computer at four strengths, or hand the phone back and forth with someone across the table.
Free · no account · works on a plane