Solid game marred by poor design decisions
Contrary to other reviewers, I do not think the gameplay itself is boring or so redundant that it cannot stand on it's own as an enjoyable game.
That's the good news.
Here's the bad:
Your responses to other reviewers are very inadequate. The links to other game sites need to be removed from the playing area, period. Telling people that you're sorry they didn't enjoy the game isn't helpful. Editing your upload for necessary changes is.
Additional information about the upgrades would be helpful. It's simple enough to understand that a damage upgrade will provide it's namesake. But I have no idea if I want to spend my very sparse, rationed points on sonic displacement, disruption shields, and bounties since you provide no documentation on what they do.