Not too bad
It was pretty amatuerish, but you did a lot of stuff right. For starters, good job on that 3d skyscraper. It looked pretty awesome, but it made everything else pale in comparison. Also, you have got sound effects down pat. Everything had a sound effect, which is pretty rare. Nice use of transparent layers.
My only reccomendations are to fully animate everything. If a guy taps his foot, you have to imagine that his leg is going to move, and in turn, the whole body will be influenced by this. If you kill a guy and his head rolls off, the body should jolt backwards and fall over. Little stuff like that. Just study how people move and learn some patience and you'll be a bad-ass force to be reckoned with. Nice job!