1. Adaptive/Responsive Gameplay All fixed values (1920, 1080, 960, 540) were replaced with canvas.width, canvas.height, and canvas.width/2, canvas.height/2 so that the game runs correctly on ALL screen resolutions (PC, laptop, fullscreen, ultrawide, etc). All wrap-around calculations, boundaries, spawns, bullets, stars, the ship, etc., are now fully dynamic.

2. Mouse Movement Standardization The ship in mouse mode now has a fixed speed towards the cursor, regardless of the user's mouse DPI/sensitivity. So everyone plays at the same speed, with no advantage for those with a faster mouse.

3. Centering and Proper Spawning Anything related to the center of the screen (e.g., ship spawn, asteroid spawn, initial positions) now uses the real center (canvas.width/2, canvas.height/2), not hardcoded values. Asteroids never spawn directly on top of the ship, no matter the resolution.

4. Canvas & UI Clearing ctx.clearRect now clears the entire screen, not just 1920x1080 pixels. All graphics (stars, asteroids, ship, UI) adapt to the screen dimensions.

5. Heart-Asteroid (Bonus Life) The feature for spawning an asteroid with a heart for bonus life was fixed, so it triggers based on score, regardless of screen size.6. Mouse Position Scaling

6.The mouse event now correctly accounts for canvas scaling, so aiming works perfectly on every resolution.

7. Minor Bugs and Syntax Fixes We fixed issues to prevent the game from crashing due to typos, missing brackets, or incorrect sequence during resize/init.

8. When a player loses the game at a high level (e.g., Level 10) and restarts using the same profile, the game visually restarts at Level 1, but the background movement and asteroid behavior remain at Level 10 difficulty. Fixed

You can also download the Windows .exe version for free.