How to Play Brain Puzzles — Number & Block Puzzle Guide

Brain Puzzles contains two classic wooden puzzle games in one: a Number Puzzle (sliding tiles) and a Block Puzzle (Unblock Me). This guide covers rules, controls, difficulty settings, and hints for both modes.

Number Puzzle

The goal

Arrange all numbered tiles into ascending order — 1, 2, 3 … n — reading left-to-right, top-to-bottom, with the empty space in the bottom-right corner. On the 3×3 grid that means tiles 1–8; on 4×4 it's 1–15; on 5×5 it's 1–24.

Controls

Tap / click a tile in the same row or column as the empty space to slide it (and all tiles between it and the blank) toward the gap.
Arrow keys slide the tile adjacent to the blank in the pressed direction.
Multi-tile slides are supported: tapping a tile two or three spaces away moves the whole run in one action.

Difficulty

Use the size chips at the top of the Number Puzzle screen to switch between 3×3 (8 tiles, easiest), 4×4 (15 tiles, moderate) and 5×5 (24 tiles, challenging). Each size tracks its own best time in your browser.

Hint

Tap the Hint button to highlight the tile whose slide most reduces the total Manhattan distance of all tiles to their goal positions. This is a fast heuristic — it won't always be the globally optimal move, but it reliably points you toward progress when you're stuck.

Solvable shuffles

Every new puzzle is generated by applying a long sequence of random legal moves from the solved state, so it is always solvable. You will never be handed an impossible board.

Tip: the Number Puzzle tracks your best time per size. Tap New to shuffle a fresh board at any time without losing your current best.

Block Puzzle

The goal

Slide the red block out through the exit gap on the right side of the 6×6 wooden board. Other blocks obstruct the path — move them out of the way to clear a lane for the red block to escape.

Controls

Drag / swipe a block along its axis (horizontal blocks move left or right; vertical blocks move up or down).
Blocks cannot pass through each other or leave the board. The game snaps to the nearest valid cell on release.
Works with touch (mobile/tablet) and mouse (desktop) via Pointer Events.

Levels and difficulty

There are 25 handcrafted levels ranging from Beginner to Expert. Use the Prev / Next arrows to navigate, or let the game advance automatically when you solve a puzzle. Your highest reached level is saved in your browser.

Each level displays its par — the minimum number of moves needed to solve it, computed by the built-in BFS solver. Try to match or beat par for an extra challenge.

Hint, Undo, and Reset

Hint: highlights the block that should move next according to the shortest solution. Tap the hint button again for the next step.
Undo: reverses your last move. You can undo multiple times back to the start of the current attempt.
Reset: returns all blocks to their starting positions for the current level.

Tip: if you're stuck, use Hint once to get unstuck, then try to figure out the rest yourself. This trains you to recognise the patterns that appear across multiple levels — see the strategy guide for the key techniques.

Themes and sound

Brain Puzzles offers three visual wood themes — Classic Wood (warm pine), Dark Walnut (deep grain), and Slate (modern stone). Pick your favourite from the theme chips in the top bar; your choice is saved automatically.

Sound effects are generated via the Web Audio API — no audio files to download. Toggle sound on or off with the mute button. The game also respects your device's reduced-motion preference: particle effects and large animations are disabled automatically if you have that setting on.

Playing on mobile

Brain Puzzles is fully touch-optimised. All controls use tap targets of at least 44px. On the Number Puzzle, tap the tile to slide it. On the Block Puzzle, drag a block with your finger along its axis. Pinch-to-zoom is not needed — the board fits naturally on phone screens in portrait orientation.