Defend your base from the attack of alien enemies and ghosts in this strategy-based tower defense game.

There are 2 types of enemies:

• Ground Alien
• Air Ghost

Control the tower using the power-ups:

The speed of the cannon ball depends on the horizontal touch position. The power-ups are available for 3 types of enemies:

Battering Ram - It can destroy all enemies in a row.

Burning Arrows - It can destroy all enemies in a row, or in a column.

The enemy will be destroyed if the power-up is used consecutively with the required amount of bullets.

There are 3 attractive power-ups:

The speed of the cannon ball depends on the horizontal touch position.

The power-up will be used when the required amount of enemies are destroyed.