You have a really quirky style going...
It's not a bad thing per se, I kind of like it. It looks satyrical in way.
This piece in particular might not be your best work, but the rest of them aren't bad.
I'd like to see more work, see how your art evolves. Maybe try to make backgrounds, or maybe have a few characters interact on the same drawing? Fighting together, striking a pose, what have you.
There isn't much to critique on for now though.
Nothing that hasn't already been said, anyway.
I think you've got potential though :D
But that's just my personal opinion.
Keep at it.