Its too big, out of proportion and badly pixelled...try using the line tool, show variation in colour on the blade....get rid of the black outline and make it a darker colour then the middle....i believe the size of the icon should be 24 x 24 and this is clearly huge in comparison.
So yeah, i'd recommend making it from scratch...keep trying to perfect your pixel work...make it look more attractive by keeping it in proportion and try not to out pixel it cause theres loads of outta place pixels and also try and colour it properly with different tones and don't just pick the default red or what not....make it less natural as it looks better.