I liked the way you started the song, exactly how you described it, a great background for a stealth attack, or any sort of staying in hiding.
Liked the slow melody at 0:14 and the sound you used on it (some guitar with effects or a synth lead?), but i think the drums were a bit too quick when it comes to intervals between the snare hits. I loved the way you used the tom to create something much like a melody, but it was a bit too fast due to the snares (this wouldn't be a problem, but I don't think it fits well with the sneaking-around setting). Increasing the gaps to, let's say, every 4th beat instead of every 2nd would greatly improve the song in my view. But maybe this is just a personal preference of mine, so I won't give you a lower rating for it.
I found it a fun submission to listen to, and I believe it could be used in a very versatile collection of flash movies and/or games. Good work!