Sparky of Justice(?)

[GameKid]

I made this little game in about an hour or so... You are Sparky and you must defend your house from the undead. The controls are:

Z to strike, fast and effective against zombies
X to uppercut, slower than strike but it also hits skeletons
Left and right arrow keys to move
UPDATE: Use C to dash to get behind or in front of pesky zombies

It's kind of sucky as it only has a little bit of variety and virtually no challenge... But that's what this section is for, right? C&C please, and tell me if there's anything you think I should implement.