Game Cotrols;
Player 1: "W"
Player 2: "UP ARROW"

Also, you ca use "MOUSE" for 1 Player!

Ragdoll Duel is a funny duel game that can be played by 1 and 2 player. Shoot wisely in this ragdoll game, time your shots to aim and shoot down your opponent. You can increase your health bar and weapon power with the coins you earn in 1 Player mode.

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