Love the change up with having to go to the targets to get your score, forcing the player to move. If they had a expiration of some kind that could up the stakes a little more. Nice work!
Asteroids in Unity3d. A simple portfolio piece
WAD to move, space to shoot. Pick up the targets to get a high score.
Github is here: https://github.com/alexjhetherington/asteroidz. Feel free to fork it, learn from it, pull request if you have anything interesting.