Screw Puzzle.
Metal plates, colourful bolts and a five-slot buffer. Which screw comes out next?
Keyboard and accessible move buttons
Use Tab and Enter to select these controls. On Block Puzzle, select a piece here, then use arrows and Enter on the focused board.
How to play Screw Puzzle
Remove 18 screws and release nine metal plates. Two active boxes each accept three matching screws. Completing one opens the next. Other colours occupy a five-slot temporary tray. Matching buffered screws automatically enter each newly opened box.
Computer, mobile and keyboard controls
Tap a visible, uncovered screw. A plate falls after both of its screws are removed, exposing screws underneath. Darkened screws are covered by a higher plate. The two coloured strips identify the active box colours.
Mouse clicks and touchscreen taps use the same rules. Open the accessible controls for HTML move buttons. Escape pauses the focused board; Z undoes a move before the run ends. Changing tabs pauses play.
Tips and strategy
Prioritise either active box, while removing screws that release a plate. Do not fill all five buffer slots unless another accessible screw can finish the current box. The run ends if the buffer is full and no accessible screw matching either active box remains.
Score and Puzzle Coins
50 points per screw and 100 per completed box. Undo is free before the run ends. The puzzle is an original screw-sorting game with layered plates, not a simulation of real structural engineering.
A finished run needs at least 10 active seconds to earn final coins. The reward is floor(score / 30) + 2 per full 30 active seconds, limited to 5–50 coins. Short runs still save their score. Time paused, hidden or idle for more than a minute is not counted.
Puzzle Coins belong only to this portal. Puzzle coins unlock permanent visual themes; hints and undo are free. Themes do not change the rules.
Saving and your profile
Won and lost runs save automatically. Use End & save to stop early. Your unfinished board resumes when you return. Guest coins and records stay in this browser. Your wallet and scores stay separate from Arcade. The leaderboard shows your own results, not other visitors.