You say this is for a top-down shooter? This sprite doesn't look very top-down, unless the guy is lying on the floor. Top-down shooters, unless they're in space, tend to show the head and shoulders. As seen from above. Thus, top-down. Also, his arms look a bit small ;-) But I'm sure you'll fix that in a soon update. Color-wise, he still wants more contrast; some hue shifts may help the palette a bit. Overall, I must say that it's better than the stuff I made after not pixeling for a year. Keep it up!