Balloon package

Three explosive parcels on air balloons. If they will not be shot, they will fly straight toward the opponent's gate dealing damage to units and tower.
mana_cost40
cooldown6000
min_y-370
max_y-130
max_velocity_y50
base_velocity100
velocity_x_variance5
max_acc_y30
acc_y_change_period3500
acc_y_change_varience1500
start_edge_offset100
distance200
bomb_gravity200
explosion_radius150
explosion_damage30
tower_damage10
end_edge_offset350
fly_away_acc100
bomb_explosion_duration2000