Color Nuts & Bolts Puzzle

Gameplay & Rules
Color Nuts & Bolts Puzzle is a relaxing color sorting puzzle, sharing similar logic with water sort games. Players sort colorful nuts on different bolts to complete level challenges, with increasing complexity in later stages.
Core Sorting Rules
Multiple vertical bolts are placed on the game interface, and various colored nuts are stacked on each bolt. You can only move the top nut of one bolt to another bolt. The target bolt must either be empty or have nuts of the identical color on top. The goal is to gather all nuts of the same color on one single bolt.
Difficulty Design
Early levels have few colors and bolts, which are easy to solve. In advanced levels, the number of colors and stacked nuts increases. Some lower nuts are hidden under multiple layers, requiring reasonable moving sequences to expose and sort them, greatly boosting the puzzle difficulty.
Operation Guide
Click or tap a bolt to pick up its top nut, then click or tap the target bolt to place the nut. The operation is simple and adaptive to both PC and mobile devices.
Game Mechanism
No time limits or failure penalties. You can undo moves or restart the current level whenever you get stuck, allowing you to try different sorting strategies repeatedly.
Game Features & Tips
Reserve empty bolts as temporary transfer stations to resolve sorting deadlocks.
Deal with the uppermost nuts first and plan the moving order for hidden lower nuts in advance.
Do not move nuts randomly; a messy stack will make the puzzle harder to solve.

Objective: Match the colored screws to their corresponding nuts on the board.

How to Play:
1) Drag and drop screws to the nuts of the same color.
2) Ensure the screws fit correctly without overlapping or blocking other screws.

Challenge Mode: Solve a series of puzzles to reveal a complete picture!

Win Condition: Complete the puzzle by successfully matching all screws to their nuts.