A nice shoot 'em up.
If there's one thing I have to say that is this game's "saving grace", it's the fact that it has a button configuration option (something most other flash games lack). As a result, this game can be played by anyone without said person having to struggle with a default control layout they're not used to.
That aside, the game itself is overall good - I like how the difficulty gradually increases as the kill count increases, which adds to the challenge.
The only real flaw is the aiming system, which can be problematic at times, especially when there are a swarm of enemies to make things hectic. Also the unreliability of grabbing the weapons you want - as the character simply picks up whatever he walks by - can be a bit vexing as well.
Overall, the game design is nice, the graphics are pretty, the character customization gives a bit of variety, and it plays fairly smoothly. Again, the option to customize the controls is what really makes me like the game along with the other elements (I cannot stress this enough). Of course, adding Medals doesn't hurt either. :3