There are a number of ways to attack in battle mode.
Normal attacks - tap screen
Heavy attacks - swipe up or down
Special attacks - tap on the skill buttons near the bottom of the device screen
You can dodge and avoid your opponent's attacks by swiping left or right on the device screen, remember some attacks are not dodgeable. You can also block attacks from opponents. Press and hold the "Block" button located on the bottom of the device screen to block an attack.
If you are having trouble please open a ticket with our support team!