Inertia
Slide, collect every gem and steer clear of mines
- Gems left
- –
- Deaths
- –
Tap the grid to slide toward that square, or use the direction buttons. Arrow keys slide up, right, down or left; number keys 1–9 follow the numeric keypad (5 does nothing). Space or Enter follows a solver arrow. Ctrl or ⌘ Z undoes; Shift Z redoes.
Progress saves on this device.
How to play
Collect every gem without hitting a mine. Slide in any of eight directions. The ball keeps moving until it reaches a stop square or a wall blocks the next square. Gems do not stop it. Diagonal gaps between walls are passable.
A mine kills the ball, even if the same slide collected the last gem. Undo the fatal slide to continue. Deaths stay counted when you undo, redo or restart. New game resets them.
Show solution adds an arrow showing the next slide. Follow it or press Next solver move (Space on the board). If you stray, upstream recalculates the path where possible. Solver-assisted finishes are shown separately from wins. Undo restores previous states; Restart returns to the original grid and can be undone.
Engine: Simon Tatham’s Inertia, based on Ben Olmstead’s game. MIT license and credits.