Hmm. got potential
Not much as its is, tho, its too fast and no story detail. You should not have to explain everything in text, but you do here. If this is to begin a series then it doesn't bode well that the thing has no character.
May6 I suggst that you insert a small scene before all this, of the Boss on the phone or something. All you need is about 20 seconds of talk on the phone or something to establish personality and introduce the scene.
You only need the back of a chair and the side of his head, phone noises, maybe a view out of the window.
I don't see why he kills the guard (spelt thus, by the way) if he is coming as if with money. If he has just killed the guard, then why is everyone just standing around letting him in. It looks like you had two different ideas here and maybe got a little mixed up or carried away.
Take your time and sort this out now, cos if you want it to be a series, then you will want people to go back and see the beginning. In fact, make them go back when you submit the next one by starting with a big link button and a firm statement, with only a small play button, otherewise most people will not bother and not appretiate it to the full.
The art and animation are OK, the music is apropriate and I am sure you can make something of this. I know this is a picky review of OK work, but I wouldn't bother if I didn't think it was worth it.
Best Wishes,
Ice