The idea is solid; I liked where you were going with this.
If I had to give feedback, I'd say that there needs to be a clearer differentiation between enemy/friendly objects (they were so small you could mistake a sphere for a cube).
In addition, the camera following the player could have done with some smoothness. At the minute, it feels slightly uneasy.
Overall, I think this idea has some real potential, especially after addressing the above.
You can extend the idea by implementing things like power-ups or levels.
Fantastic effort!