After starting from scratch again I managed to finish my game in less than 24hrs (with a nights sleep). You have to dodge and destroy asteroids with just one bullet. Each wave of asteroids has one which can be destoryed. If you blow it up you get your bullet back.

Features:

Randomly generated asteroids

Randomly generated Sound effects

Multiplier Scoring based on velocity and position on screen

Link: http://www.ludumdare.com/compo/ludum-dare-28/?action=preview&uid=27122