Zip Puzzle

Zip Puzzle is a calm logic game with one rule: draw a single line that passes through every cell of the grid and visits the numbers in order. Every puzzle has exactly one solution.

Boards go from 5x5 to 9x9, and walls show up on the harder ones. There is a daily puzzle with a streak, a quick play mode where you pick the size and difficulty, and three looks to choose from, including a dark one. Undo is always free and hints draw the next stretch of the line. It works offline with no account.

I built it as a sister game to Crack the Vault, for people who like short logic puzzles they can finish on a coffee break.