I'll help you create a simplified Geometry Dash-style game using WebGL (Three.js) since OpenGL, C/C++, and Cocos2d-X can't run directly in the browser environment. Here's a single HTML file implementation:

This implementation includes:

• A 3D player cube that jumps when you press space
• Randomly generated obstacles to avoid
• Score tracking
• Game over detection
• Start and restart functionality
• Simple physics for jumping and gravity

The game runs entirely in the browser using Three.js (WebGL). While it's simplified compared to the full Geometry Dash, it captures the core gameplay mechanics.

I'll modify the code to make the player jump when clicked/touched. Here's the updated version:

Key changes made:

1. Added click and touch event listeners to the game container
2. Created a separate jump() function that handles the jumping logic
3. Modified the instructions to say "Tap anywhere to jump"
4. Added touch event prevention to avoid scrolling on mobile
5. Added CSS properties to improve touch responsiveness
6. Made the game start on first click/tap if not already started

Now the player will jump when you:

• Click/tap anywhere on the screen
• Press the space bar
• Click the player cube directly

Here's the enhanced version with a level editor and user-generated levels support:

Key features added:

1. Level Editor Mode:

   • Toggle between play and editor modes
   • Click to place obstacles
   • Save/load custom levels
   • Test your levels before saving

2. Level Selection:

   • Default pre-made levels (Easy, Medium, Hard)
   • User-created level browser
   • Delete functionality for custom levels

3. Improved UI:

   • Dedicated editor controls
   • Level selection screen
   • Better mobile touch support

4. Data Persistence:

   • Custom levels saved to localStorage
   • Level data includes obstacle positions and sizes

5. Gameplay Enhancements:

   • Fixed jumping mechanics
   • Better collision detection
   • Level-specific gameplay

The game now supports:

• Creating custom levels by placing obstacles
• Saving/loading levels from browser storage
• Testing levels before publishing
• Selecting from default or custom levels
• Deleting unwanted levels

Controls:

• Space or tap to jump
• In editor mode: click to place obstacles
• Use UI buttons to save/test/clear levels

I'll fix the game over screen visibility issue. Here's the corrected version:

Key fixes made:

1. Added gameStarted = false in checkCollision() when game over occurs
2. Modified the collision check condition in animate() to ensure it only runs when game is started
3. Added gameStarted = true in restartGame() to properly restart the game
4. Ensured game over screen is properly hidden when restarting

These changes will:

• Properly show the game over screen when collision occurs
• Hide it when restarting the game
• Prevent the game from continuing to run in the background after game over
• Ensure proper game state management between plays