This is a 3D puzzle game! A unique color-based puzzle mechanic is key to victory. You need to click on screws of the same color as the nuts stacked on the iron ring to collect them! You can see more screws by rotating the sphere. There are 7 empty slots to store screws. As you progress through the levels, the colors and quantities of the nuts become more complex. This game greatly tests your on - the-spot decision - making and resource allocation abilities!