Click the flag 2 times else it would be very difficult to play. You can also crush Demon Waffentrager. Press the right and left arrow key to move . Use the z and x for laser and Space to shoot .Press and hold the down arrow key key for shield but when you attack your shield disappears for some seconds so there is a chance for demon Waffentrager, rattle, Leviathan's clone and Leviathan to attack you. Press and hold the c key for fire but when you attack your fire dissapeares for some seconds and it only hurts Leviathan"s Dark Clone. when you press x to fight Rattle rattle defends himself. and sometimes Leviathan' Dark Clone and Leviathan will use their shield too.after you defeat Leviathan's clone he tells you how to use your imortal shield. When you use imortal shield your enemi's bullet bounces and goes back to your enemy.