I'm trying to make a swarm of boids which seek out the mouse position and move towards it, but I'm having a bit of a problem.

The boids just seem to want to go to upper-right corner of the game window. The mouse position seems influence the behavior a bit, but not enough to make the boid turn towards it.

I suspect there is a problem with the way LibGDX handles its coordinate system, but I'm not sure how to fix it

I've uploaded the eclipse project here!

Also here are the relevant bits of my code, in case you see something obviously wrong:

public Agent(){
    _texture = GdxGame.TEX_AGENT;

    TextureRegion region = new TextureRegion(_texture, 0, 0, 32, 32);
    TextureRegion region2 = new TextureRegion(GdxGame.TEX_TARGET, 0, 0, 32, 32);

    _sprite = new Sprite(region);
    _sprite.setSize(.05f, .05f);

    _sprite_target = new Sprite(region2);
    _sprite_target.setSize(.1f, .1f);

    _max_velocity = 0.05f;
    _max_speed = 0.005f;

    _velocity = new Vector2(0, 0);
    _desired_velocity = new Vector2(0, 0);
    _steering = new Vector2(0, 0);
    _position = new Vector2(-_sprite.getWidth()/2, -_sprite.getHeight()/2);

    _mass = 10f;
}

public void Update(float deltaTime){
    _target = new Vector2(Gdx.input.getX(), Gdx.input.getY());

    _desired_velocity = ((_target.sub(_position)).nor()).scl(_max_velocity,_max_velocity);
    _steering = ((_desired_velocity.sub(_velocity)).limit(_max_speed)).div(_mass);

    _velocity = (_velocity.add(_steering)).limit(_max_speed);
    _position = _position.add(_velocity);

    _sprite.setPosition(_position.x, _position.y);
    _sprite_target.setPosition(Gdx.input.getX(), Gdx.input.getY());
}

I've used this tutorial here.

Thanks!