I'm back with another question that may be really simple.

I've a texture drawn on my spritebatch and I'm making it move up or down (y-axis only) with Libgdx's Input Handler: touchDown and touchUp.

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
    myWhale.touchDownY = screenY;
    myWhale.isTouched = true;
    return true;
}

@Override
public boolean touchUp(int screenX, int screenY, int pointer, int button) {
    myWhale.isTouched = false;
    return false;
}

myWhale is an object from Whale Class where I move my texture position:

public void update(float delta) {
    this.delta = delta;
    if(isTouched){
        dragWhale();
    }
}

public void dragWhale() {
    if(Gdx.input.getY(0) - touchDownY < 0){
        if(Gdx.input.getY(0)<position.y+height/2){
            position.y = position.y - velocidad*delta;
        }
    }
    else{
        if(Gdx.input.getY(0)>position.y+height/2){
            position.y = position.y + velocidad*delta;
        }
    }
}

So the object moves to the center of the position where the person is pressing his/her finger and most of the time it works fine but the object seems to take about half a second to move up or down and sometimes when I press my finger it wont move.

Maybe there's another simplier way to do this. I'd highly appreciate if someone points me on the right direction.