From the Author:
HTML5 Asteroids is back!
One of the first HTML5 canvas games - Asteroids is back! Now Asteroids [Reloaded] uses a new 60 fps game engine with awesome particle explosions and now with retro style sound effects!
Powerups, juicy explosions, glowing vector graphics or modern rendered graphics, green lasers, it's retro gaming heaven!
Full commented game source code is available for download also.