Quite good for your first game, congrats. And there is something hilarious about security trying to stop a rampaging HR woman on a firing spree.
I'm sure you are well aware of the game's flaws so no need to point them out, but I'll drop a tip that shouldn't cost much time to implement - make things that are most fun easier to achieve. Most fun in this case is watching those guards fly through the window, and seeing them stop a few pixels away from the edge too often is irritating, so if they flew a bit longer that would be a quick fix.