Really enyojed it and the concept of blowing a heart of a station and the other parts of a station just blow up in a chain reaction. Cool.
The controls are horrid, you cant' survive without a shield at the later levels so the other weapons are useless.
One thing bugs me, the final weapons upgrade is weaker than the one before it.
**Fix that please**
All in all, pretty unconventional concept for a game. Good job.