Remove extra content (to be added later with proper design)
Fix edge collision detection logic.

Earlier check was making the ball stuck in infinite loop around the
edges and making it die. Improved logic will avoid that.
Control suzhi through keyboard instead of mouse for better gameplay.
Tweak suzhi control logic.

Now suzhi is more responsive to how user controls it.
Add addons.
Add lifeline around suzhi.
Add HUD.
Limit negative score to 0.
Bolt the baddies.
Update intro and game over screens with help controls.
Update site content and ad.
Update game screenshot.
Image cache busting.