OneGap: Number Slide Puzzle

OneGap is a classic number slide puzzle — the 15 puzzle you know, rebuilt as a clean offline brain game. No account, no internet, no noise: just tiles, numbers, and your best time.

HOW TO PLAY
Tap a tile next to the blank slot to slide it. Re-arrange the numbers 1..N into ascending order, ending with the blank at the bottom-right corner, to solve the puzzle. Fewer moves and less time means a better score. Every sliding puzzle player knows the feeling: one move from done, then one move back.

THREE BOARD SIZES
• 3x3 Classic — a quick warm-up
• 4x4 Advanced — the classic 15 puzzle challenge
• 5x5 Challenge — a real workout for sliding puzzle lovers

PLAY OFFLINE, ANYWHERE
OneGap works with no Wi-Fi and no login. It is a lightweight offline puzzle game, perfect for commutes, queues, and short breaks — and it is a calm alternative to loud, busy puzzle games.

YOUR BEST, KEPT ON DEVICE
Best time and fewest moves are saved locally for every board size, so you compete against your own records. Improving by a single move is a win. Local data never leaves your device; uninstalling the app clears it.

OPTIONAL CLOUD LEADERBOARDS
Prefer to compete worldwide? After signing in to Google Play Games (13+), your best result per difficulty can be uploaded to cloud leaderboards for fastest time and fewest moves. Sign out anytime in the Leaderboards panel to stop uploading.

EASY TO RELAX
Sound and vibration can be switched off in Settings. Clean design, warm colors, ten-second rules — a puzzle game for adults and kids alike. If you enjoy logic puzzles, brain teasers, tile puzzle challenges, or simply want a quiet offline game for a break, this is it.

OneGap does not collect your name, phone number, or location. See the Privacy Policy for details.