Minesweeper

Entry: main menu g → Games 8

A full-rules Minesweeper with per-difficulty records for fastest clear and win streak. The first cell you dig and its eight neighbours are guaranteed mine-free, so every game opens with a cleared area and you can never lose on the first click.

Screenshots

Shortcuts

Key	Action
; , . / / arrows / EASD	Move the cursor (hold to repeat)
Space / ] / Enter / GO	Dig; on a revealed number it performs a chord
f / [	Place / remove a flag
i	Toggle IMU tilt cursor movement (also recenters the neutral pose)
1 2 3	Switch to EASY / NORMAL / HARD (starts a new game)
r	New game
b	Open / close the records page
h	Help
ESC / GO	Back to the game shelf

Difficulties

Level	Board	Mines	Density
EASY	10 × 7	10	14.3%
NORMAL	15 × 9	22	16.3%
HARD	22 × 11	50	20.7%

How it plays

• Safe first dig: mines are placed after the first dig, excluding that cell and its neighbours, so the board always opens up.
• Flood reveal: digging a zero expands outwards to the number border. Flagged cells are never auto-revealed.
• Adjacent flag / dig pair: [ flags and ] digs. The two keys sit side by side so one hand can alternate between them instead of reaching across from f to Space; f and Space still work.
• Chord: put the cursor on a revealed number whose flag count matches it and press Space / ] to open all remaining neighbours at once. This is the main speed-up move — and a misplaced flag will blow you up here.
• Timer: starts on the first dig, stops on win or loss, displays up to 999 seconds.
• Loss: the mine you hit turns red, every other mine is exposed, and wrong flags get a red cross.
• Win: remaining mines are auto-flagged and a golden banner appears, showing NEW BEST! when you beat your record.

IMU tilt cursor

Press i to move the cursor by tilting the device; keyboard arrows keep working. A gold IMU badge appears next to the remaining-mine count while it is active, and boards without an IMU briefly show a red NO IMU instead.

• Neutral pose: pressing i records the pose you are holding as the centre, so the device does not need to be level. Press i twice to recalibrate after shifting position.
• All four directions have symmetric range: detection uses the angle the gravity vector has rotated away from the calibrated pose rather than one axis' raw reading, so no direction runs out of range on a steeply held device.
• Direction mapping: tilt up to move up, tilt right to move right. Screen-right is derived from "screen-up × the gravity direction at calibration" instead of being hard-coded to a body axis.
• Mouse-like glide: one step needs roughly 7° of rotation and the cursor keeps travelling while you hold the tilt, releasing below roughly 3.5°. The further you tilt the faster it goes, ramping from one step per 260ms up to one per 45ms at roughly 22° or more.
• Tilt dot: the small box right of the IMU badge holds a dot that follows your tilt, so you can confirm all four directions register.
• Dig / flag: still Space / ] / Enter / GO and f / [; tilting only moves the cursor.

Records

Press b for the records page, listed per difficulty:

Column	Meaning
BEST	Fastest clear in seconds, -- if never cleared
WIN/PLAY	Games won / games played
STREAK	Longest win streak ever

The bottom line shows the current streak for the selected difficulty, which resets to zero on a loss.

Records live in /mines_rec.dat on flash and survive reboots and firmware updates (only reflashing the filesystem clears them).