Optimized performance and solved sound disapear issue

Happy New Year!

The holiday is over. Come back to work!

We have just released a patch version that fixes some of the current issues, as follows:

• optimize the performance of the game, significantly reducing the memory footprint of the game. Now even in the very high waves of workshop-fight the game won't stuck.
  After
• Solved the issue that the sound will disappear after running for a period of time.

The content update is in development, can't wait to see you guys ~!