that's a glitch, can you let me know what OS you are using, GPU, CPU, and Browser?
Oh wow, the game is definitely not designed for that environment at all. I looked up your hardware and I am making an educated guess to say that it might not have WebGL 2 support. Can you visit https://get.webgl.org/webgl2/ to see if says "Your browser supports WebGL2"?
If I am correct then I will be downgrading the game to use WebGL 1 instead.