To organize and categorize Nodes in the main scene, "game" Scene, follow the steps below.
1. While the "game" Scene and "Game" Node are selected, create a new Node by clicking the + sign under the Scene tab or by clicking the Ctrl-A key combination.
2. In the Create New Node window that appears, in the Search line, search for Node and select it, and click the Create button.
3. Change the name of the "Node" Node to "Coins". Move all Coin Nodes into this Node.
4. Create a new Node.
5. In the Create New Node window that appears, in the Search line, search for Node and select it, and click the Create button.
6. Change the name of the "Node" Node to "Platforms". Move all Platform Nodes into this Node.
7. "Game" Node structure will be as follows.
8. Save all scenes with Ctrl-S.
