When starting the game do not use mines on the first four levels, if you want high bonuses.
Mine kills = times 2
Balloon kills = times 3
2. When a Chia omber fires at you, do not turn and fire, usually by the time you turn, their mud balls will hit you before you have time to backfire.
3. Always target the Chia bomber that has fired at you but missed. After their first firing attempt, they will hunt for you.
4. Save the mines for Chia bombers will more lives.
This is the order of lives of a Chia bomber on Chia Bomber 2:
Green = 1