Use mouse to aim 'W' to walk 'R' to shoot fireballs (click and hold before launch to bend the fireballs) hold 'R' to flamethrower hold 'F' and click on the water or on the ground to bend, then release to launch them. (click and hold before launch to bend the water) hold 'S' to redirect elements. hold 'A' to create an air shield. 'E' to launch airballs. hold 'G' and click on the water to create a water shield or on the ground to create an earth wall. hold 'H' and click on the water then click anywhere to freez or on the ground to teleport below ground. hold 'Q' to enter the avatar state. when on avatar state and on water, press 'T' to special waterbending (use 'F' G 'and' H 'to attack) when on the water press 'S' to to create a water shield; 'Y' for... pocket water 'U' for pocket... earth? ok what is with the pocke-
huge thanks to @faxfoxx