Classic music. :) I like the style - it reminds me of the good ol' Marshmellow Madness days, and the animation overall's not bad at all! A few things to improve: the cracks in the wall don't seem all that realistic, maybe you could study images of those and find the 'pattern' a bit? The blood effects are gone, but some seem to appear almost at random, like the final one when he pushes the guy into the table - considering you don't really see the guy on the table 'move'. If the impact showed that'd look better I think, was actually wondering what happened at first. Did he shoot him? Did he stab him with a finger...? If you're going for more 'natural' action it also feels like the characters are moving around unnecessarily much without doing much damage, but in this particular case that just seems to add to the fun. Great start, and keep it going!
-cd-