I actually like this as well. Seriously 99% of the people that post figure drawings for critique have horrible proportion. However, you seem to have done an excellent job. I don't feel like this character is unbalanced or funny looking and he appears very grounded while actually just floating around in white space like that.
Only criticism I have is:
-Clean up the linework
-Shading
-Anti-aliasing (after shading)
-Straighten the sword. (I can even see this character wielding a larger sword, so it's up to you to make it longer or not, but it could be interesting.)
Other than that, you did an excellent job and if your game has all of your styled artwork like this, then it should be a very beautiful game.