Flash制作物体弹跳电脑游戏

Flash制作物体弹跳电脑游戏(8)             place_brick.gotoAndStop(level[y][x]);
        }
    }
}
_root.attachMovie("player", "player", _root.getNextHighestDepth(), {_x:40, _y:40});
player.onEnterFrame = function() {
    if (Key.isDown(Key.LEFT)) {
        if (jump_walk or can_jump) {
            xspeed = -walk_speed;
        }
    }
    if (Key.isDown(Key.RIGHT)) {
        if (jump_walk or can_jump) {
            xspeed = walk_speed;
        }
    }
    if (Key.isDown(Key.SPACE) and can_jump) {
        yspeed -= jump_power;
        can_jump = false;
    }
    yspeed += gravity;
    if (yspeed>max_yspeed) {
        yspeed = max_yspeed;
    }
    while (_root.lev.hitTest(this._x, this._y+this._height/2-1+yspeed, true)) {
        yspeed--;
        can_jump = true;
    }
    while (_root.lev.hitTest(this._x-this._width/2+1+xspeed, this._y, true)) {
        xspeed++;
    }
    while (_root.lev.hitTest(this._x+this._width/2-1+xspeed, this._y, true)) {
        xspeed--;
    }
    while (_root.lev.hitTest(this._x, this._y-this._height/2+1+yspeed, true)) {
        yspeed++;