add more levels
How to play:
The Player, controlling a Tank, must destroy enemy tanks in each level. The enemy tanks attempt to destroy the player's base, as well as the human tank itself. A level is completed when the player destroys all 20 enemy tanks, but the game ends if the player's base is destroyed or the player loses all available lives. Note that the player tank's weapon can destroy the base as well,so shoot carefully.
Features:
Heart: a symbol that gives an extra life.
Bomb: destroys all visible enemy tanks;
Clock: freezes all enemy tanks for a period of time;
Tools: adds steel walls around the Phoenix for a period of time.
Shield: makes player's tank invulnerable to attack for a period of time.
Star: Bullet which can traverse through the walls
Laser: Bullet can destroy steels
Missile: can make a wide range of damage
Light: Makes bullets move fast
