Nice work
There are some audio issues you need to work out, but overall it's a very solid piece. The piece continues to play in the background throughout the flash, which is likely why the machine gun is so damned loud ... an attempt to cover it. You can still "sort of" hear it in the background, which is extremely distracting. Either get it out of those scenes entirely, or tone down the gun a bit so you can actually hear it.
Audio on the girl is way too low. Damned near impossible to make out what she says ... even more distracting than above.
You've got the usual issue most new artists have with audio. If I choose to rewind the flash, the audio continues to stream along. If I hit play, it starts up from the beginning as well, creating a round-robin.