[AS3] Hit detection

[TheNooblet]

Hey guys. Well I got bored and decided to make a small game.
But I have ran into an issue with making walls, ages ago I downloaded a source code for a game with hit detection for walls, and I thought it was decent enough to use here. Its just a Boolean for everytime someone comes in counter with a wall. There are no errors, it is just not very effective. Any tips on making this work more realistic, currently I can go into the wall but it does push me out, and if I go in threw the top of the wall it just pushes me threw (I know what causes it, as I am just adding onto the X and Y coordinate, but I can't think of anything to fix that. Thanks!

stage.addEventListener(KeyboardEvent.KEY_DOWN, right);
stage.addEventListener(KeyboardEvent.KEY_DOWN, left);
stage.addEventListener(KeyboardEvent.KEY_DOWN, up);
stage.addEventListener(KeyboardEvent.KEY_DOWN, down);

var hitWall:Boolean = false;

var player:Shape = new Shape();
player.graphics.beginFill(0x0000FF);
player.graphics.drawCircle(5, 5, 5);
player.y = 350;
addChild(player);

var theWall:wall = new wall();
addChild(theWall);

var checkDec:Timer = new Timer(1);
checkDec.addEventListener(TimerEvent.TIMER, checkHitDec);
checkDec.start();


function checkHitDec(event:TimerEvent) : void {
       if(Shape(player).hitTestObject(theWall)) {
        hitWall=true;
        player.x += 1
        player.y += 2
        hitWall=false
       }
}

function up(bmove:KeyboardEvent):void{
    if (bmove.keyCode==Keyboard.UP && hitWall==false){
        player.y-= 10
    } 
};

function down(bmove:KeyboardEvent):void{
    if (bmove.keyCode==Keyboard.DOWN && hitWall==false){
        player.y+= 10
    } 
};

function right(bmove:KeyboardEvent):void{
    if (bmove.keyCode==Keyboard.RIGHT && hitWall==false){
        player.x+= 10
    } 
};

function left(bmove:KeyboardEvent):void{
    if (bmove.keyCode==Keyboard.LEFT && hitWall==false) {
        player.x-= 10
    }
};