Screw Nuts Snap Puzzle

Screw Nuts Snap Puzzle is about taking screws out in the right order. The screws sit in layered glass shapes, and only the ones you can actually reach come out, so a board is really a question of which layer to open first. Collected screws go into boxes of their own colour, and each box takes three; the spare slots are working room rather than storage, and filling them ends the attempt. Clearing the layers without running out of space is the whole game, and the tools reflect that: extra slots, box swaps and a hammer for the boards that will not open otherwise. An Unscrew mode lets you select a screw and move it to an empty hole, and cat-rescue puzzles and challenges unlock as you go. Progress is saved in the current browser.

Key mechanics

• A box takes three screws of one colour
• Unscrew mode moves a selected screw to an empty hole