It's not awful
It's pretty basic, but it's not bad, in fact, it was kind of fun.
Some suggestions though, running option/moving speed enhancement, if it was in there I missed it. It was actually kind of fun, though lacking plot or graphics, but not bad for a submission.
I suggest trying to work on the smoothness of the jumping, i.e. normal jump and mega jump (press down then up) Because the holding up was kind of annoying at times. Also consider attack range - the knife reached further than the axe. I like the zombie variety, although small.
This game has potential, tweak it, add some nifty graphics, an intro, improve character control and you have a very interesting submission. Heck, with some plot it could be a very nice flash game.
Either way, it's not bad, or awful, just a little basic. Keep at it!