Just some little changes

• update: Updated game engine, fixed some bugs.
  
• fixed: Advanced Display Settings add a new Rendering Frequency option, sacrificing the "screen" refresh rate in exchange for a stable frame rate.
  
• adjust: improve the sharpness of some bullets in StageEx Boss SpellCard 9.
  
• adjust: several fade-in effect of bullets.
  
• fixed: a spelling mistake on the title scene.
  
• adjust: slightly changed several renders and special effects.
  

We have specially processed these modifications so that the replays can be played as normal without rollback to previous versions.