Not bad :)
But it is lacking in some important areas, such as the white line bullets flying into the baddies and walls. AMMO, that Uzi had to have shot far to many bullets for a single mag. Idle movements, It makes it look a bit bland when they just stay there, motionless.
And finally Story, Something like "blargh, I want to kill this guy, cos he's a dick" is a bit boring (Being a hypocrite, I don't really have much of a different story than your one)
But. Don't let this stop you, you have potential.
Just try add a bit more depth into the flash next time :)
Happy Madness Day!