The graphics look fine. I can't help but notice they tiles ripped from an NES game. If they're not, then you're a good 8-bit pixel artist, assuming you made the art yourself, that is. (:
The music was extremely annoying. You have a mute option, but I'd like to mute the music and keep the sound effects, instead of muting everything.
Movement is too slow. You have a run, which introduces another key to use, being Shift, which is awkward. I know I'm not the only one having difficulty holding this key while trying to move with WASD keys. If I use the right-shift key, then I have to take my hand off the mouse, so I can't aim. Drop the Shift to run altogether, and consider replacing it by allowing your player to double-tap a movement key to run. Or you could just include both ways of running. It's just another key that gets in the way.
To add insult to injury, there's a stamina for running. _On top of that_, I can't run if it's recharging, even if I have stamina left.
The battle system isn't too bad, but the game tends to run a bit slow. I'm not sure if it's a performance aspect or this is by design. I think your genre is a bit misleading. You have "Action - Shooter - Multidirectional", but it's way too slow to be an action game. This is more like an RPG.
- Ziro out.