Let me help fix the issues. Here's the corrected version:

Key changes made:

1. Switched to simpler non-module Three.js setup using script tags
2. Removed complex features to focus on basic functionality
3. Simplified the UI to just basic object creation
4. Used standard Three.js CDN links
5. Ensured all basic Three.js components are properly initialized

This should now work as a basic Three.js scene with object creation buttons. You can test it by:

1. Clicking "Add Cube" to add a green cube
2. Clicking "Add Sphere" to add a red sphere
3. Clicking "Add Plane" to add a blue plane
4. Using mouse to orbit around the scene

The controls allow you to:

• Left click and drag to rotate
• Right click and drag to pan
• Scroll to zoom

Here's a Unity-like Three.js game designer with a more professional interface and layout:

Key Unity-like features included:

1. Professional dark theme interface
2. Three-panel layout (Hierarchy, Viewport, Inspector)
3. Object selection and property editing
4. Transform tools (Move, Rotate, Scale - UI only in this version)
5. Grid and axis helpers
6. Status bar
7. Hierarchy view of scene objects
8. Inspector with editable properties

The interface mimics Unity's layout with:

• Dark theme colors matching Unity
• Similar panel organization
• Hierarchy showing scene objects
• Inspector for modifying selected object properties
• Toolbar with transform tools
• Status bar at the bottom

You can:

1. Click objects in the Hierarchy to select them
2. Edit their transform properties in the Inspector
3. Orbit around the scene with mouse controls
4. See the professional layout similar to Unity

Here's a comprehensive Three.js game designer with content generation tools, similar to Unity's interface but focused on Three.js content creation:

This version includes comprehensive game design tools:

1. Primitive Creation Tools:

   • Cube, Sphere, Plane, Cylinder, Torus generators
   • Customizable materials and colors

2. Terrain Generation:

   • Configurable terrain size and height
   • Terrain smoothing tools
   • Real-time editing capabilities

3. Material Editor:

   • Standard, Phong, and Basic material types
   • Color picker for material customization
   • Apply materials to selected objects

4. Object Management:

   • Hierarchy view of all scene objects
   • Object selection system
   • Transform controls (position, rotation, scale)

5. UI Features:

   • Professional Unity-like interface
   • Tabbed content creation panels
   • Inspector with editable properties
   • Status bar feedback

6. Scene Controls:

   • Orbit controls for navigation
   • Grid and axis helpers
   • Lighting controls

The tools are organized in a workflow similar to Unity:

• Left panel: Hierarchy view
• Center panel: 3D viewport
• Right panel: Inspector and creation tools
• Bottom panel: Status information

You can:

1. Create various 3D primitives
2. Generate and edit terrain
3. Apply different materials
4. Select and transform objects
5. Navigate the 3D scene
6. Get real-time feedback on operations

The code is structured in a clean class-based architecture for maintainability and includes proper event handling and UI updates.

Let me fix the button functionality. Here's the corrected version with working buttons:

Key fixes made:

1. Proper Event Listeners: All buttons now have correct click event listeners attached
2. Simplified UI: Reduced to basic functionality to ensure everything works
3. Working Functions: Each button triggers its corresponding function
4. Console Logging: Added console logs to verify button clicks
5. Fixed Scene Clearing: Clear scene function now preserves essential elements

The buttons now work to:

• Add a green cube
• Add a red sphere
• Add a blue plane
• Add a directional light
• Clear all objects from the scene

You should see objects appearing in the scene when clicking the buttons, and console logs confirming the actions. The orbit controls allow you to navigate around the scene.

Try these steps to verify:

1. Click "Add Cube" - a green cube should appear
2. Click "Add Sphere" - a red sphere should appear
3. Click "Add Plane" - a blue plane should appear
4. Click "Add Light" - a directional light is added (you'll see better lighting)
5. Click "Clear Scene" - all objects except helpers will be removed