Pretty fantastic for a first effort! I'll agree with looneybits, the sound and music do a great job setting the atmosphere.
As others have mentioned, the 'need to move to shoot' thing is a bummer. To be honest, I didn't even realize you could shoot at first. I had to go back and read the instructions, and even then it took be a bit to grok how it worked.
Once I got to shooting though the game was kinda fun. There's just something 'so wrong it's right' about that cute little Sara sprite wandering around those blood soaked halls axing away at so many twisted baddies.
Good work! :)