25x25 Mario Head. Need C+C

[Teeks]

Okay so, just got bored and was messing around with an old project I started long ago where I was making Nintendo character mugshots. But they were 50x50. I tried that but I'm not good enough for it, so I shrunk it down to 25x25. This is what I got.

Now before I continue on with this project thing, I need some critique. The colors and basic style, you could say, are based on the style used in Scrambled and Friendly Fire. Overall, I don't have a problem with the line art, cept maybe the stache, but I do have a problem with the eyes, I need big help there. And any other crits you can give are appreciated.

So yeah, let me have it. But be gentle.