Many players want to enlarge the game window.
But we find that our game engine is too old to support chaning screen size.
We've tried lots of workarounds, but the results are not good at all.
There are delays, blurring, jagged situations, and so on.

At present, the most effective and simple way to enlarge the game window is changing the screen resolution on your PC. 
After lowering the resolution of your PC, the game window will look larger in the screen without blurring.