How do I access properties from different objects?

Is there another way in terms of syntax to access "age"? this.age wont work

I think you're having trouble with scope, and anonymous functions.

var myObject = {
    giveMeSomeName: function() {
        console.log(this)
        this.age = "20"
    }
}

here this actually references the function giveMeSomeName, not myObject. if you want to associate a value with myobject, declare it in the scope of that object, OR (common practice) pass the scope of your myObject to the function giveMeSomeName:

var myObject = {
    var that = this;
    giveMeSomeName: function() {
        console.log(that)
        that.age = "20"
    }
}

this, is a reference to the current function, obj, or window.

enemy.position.x += 3;  //how can I access 'enemy' from above?

you need to declare enemy as a global object (window.enemy) or move the functions inside the scope of enemyMovement:

function enemyMovement(enemy) {
    enemy.position.x += 3;
    enemyFunctionA();
    enemyFunctionB();
}
/r/javascript Thread