Screw Sort: Nut & Bolt Puzzle

Unscrew, sort, and clear the board. Screw Sort is a calm nuts-and-bolts puzzle with 300 handcrafted levels — and every single one is guaranteed to have a solution. HOW IT PLAYS Tap a holder and the top run of matching screws lifts out. Tap another holder and they land. Fill a holder with a single colour and it locks in, finished. Clear the board to win. That is the whole rule set. The first level teaches it in seven moves. Level 300 will not. EVERY LEVEL IS PROVABLY SOLVABLE Most sorting puzzles shuffle the board at random and hope. A random deal of screws can look completely normal and still be impossible — every holder jammed with mixed colours and nowhere left to move. You only find out after ten minutes of trying. Screw Sort does not shuffle and hope. Every level was solved by the game itself before it shipped, and the length of that solution became the level's par. So the…