Once the battle starts, there is no turning back. You can choose to hit or shoot your enemy. They make the same choice and the battle begins. When your energy bar is on level 2 or level 3 you can boost your attack power, which can then decide the outcome of the battle. Depending on how many bars you have filled you can perform level 2 or level 3 attacks thus inflicting a lot more damage to your opponent. You need to win two rounds in one battle to win. Once you've won you get to upgrade, buy power-ups and prepare for the next round. The game is played using keyboard only.