Mouse, Arrow Key or WASD

EG Big Snake is an addictive new mobile game that combines the classic game of snake with elements. Controlling your snake in EG Big Snake is simple, as your snake is entirely controlled using the joystick button. The worm will continuously slither in the direction of your finger, so turning your worm is as simple as moving your joystick button.
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For iOS:
Safari on iOS 8 and later supports WebGL 1.0, and on iOS 15 and later supports WebGL 2.0.

For Android：
Nearly all of them support WebGL