Asteroid Arena v2!

Hi,

After posting an initial demo of Asteroid Arena, I've updated it with more better gameplay.  Here's what's new:

• Asteroids break apart into smaller asteroids when shot.
• Powerups!  The float into the arena randomly; fly over them to see what they contain.
• Few graphics tweaks, like lights on bullets and powerups.
• Full screen mode now supported

This is the first game I've ever published.  Try it out and let me know what you think!