If you have coins available, start with a Full Attack boost to deal massive first damage to your enemy. Counterattack is also a good option if you have the coins to spend. Do not hit any obstacles because they will drain your health. Be patient and gather red coins until have a maximum strike that will cause a critical hit. Watch your health and get the green coins when necessary. Do a weak attack as soon as possible, in case the enemy has the Counterattack boost purchased.