Arguments:
        1) real const: objectType
    Return Type:
        real
    Creates an enemy object of the specified type and returns its ID.
Object types are:
OBJ_ENEMY OBJ_ENEMY_BOSS
In order to draw the enemy object and have it listed as an existing enemy, you have to register it using ObjEnemy_Regist.
If you want to create a boss enemy object, you have to create a boss scene object first.
    Arguments:
        1) real: objectID
    Activates the specified enemy object.
Enemy objects cannot be utilized until this functions is called.
    Arguments:
        1) real: objectID
        2) real const: infoType
    Return Type:
        varies
    Returns info about the enemy object based on the given infoType constant.
Info types are:
INFO_LIFE - Returns the life points of the enemy (real) INFO_DAMAGE_RATE_SHOT - Returns the damage rate percentage of normal player shots set by ObjEnemy_SetDamageRate (real: 1-100) INFO_DAMAGE_RATE_SPELL - Returns the damage rate percentage of player bombs set by ObjEnemy_SetDamageRate (real: 1-100) INFO_SHOT_HIT_COUNT - Returns the amount of times the enemy was hit by player bullets in the previous frame (real)
    Arguments:
        1) real: objectID
        2) real: life
    Sets the amount of life points for the enemy object.
    Arguments:
        1) real: objectID
        2) real: lifeToAdd
    Adds the amount of life points to the enemy object's current life.
    Arguments:
        1) real: objectID
        2) real: shotDamageRate
        3) real: spellDamageRate
    Sets the damage rate of the player's attacks against the specified enemy.
Setting to 0 will cause the enemy to take no damage, 100 is the default (100%) value.
Values above 100 are possible.
Values below 0 are also possible, but may cause the boss health to overflow.
    Arguments:
        1) real: objectID
        2) real: x
        3) real: y
        4) real: radius
    Sets the position and size of the enemy hitbox.
Any collision with player shots or spells with the circle will damage the enemy.
Note: This function must be called every frame to maintain the collision.
    Arguments:
        1) real: objectID
        2) real: x
        3) real: y
        4) real: radius
    Sets the enemy hitbox for player collision.
Any collision with the circle will kill the player.
Note: This function must be called every frame to maintain the collision.