I don't know if your most recent post with the cropped image was a response to pkmays telling you you should make it smaller, but I definitely think it looks worse cropped like that.

The chaotic stuff at the top is what a lot of us like about this, and the head being all white looks good when in contrast to that.

I also don't like the solid white head on the other guy. In the first picture, it looked like he had no head and I thought it was much more interesting.
The small guy with no head offering something to this giant head with no body, all in a war torn city. It even seemed like the giant head was looking THROUGH the small dude, and the small one is offering something to the giant head which seems to indicate he is of a higher class or of more importance.

This is part of the nature of such scribbley art though, people tend to see in it what they want to see.
I hope you find this post as interesting as I found that first piece.

That looks very odd, it looks like his legs are getting twisted up like noodles.
Maybe it's just due to the low frame count, but yeah... very odd.

You know, I liked that I felt a sort of "weight" with Lectro in the demo. I kept playing a "clunk!" sound effect in my head whenever he jumped and landed.

Maybe if I make a cool thread programmers will come along and make stuff for me too!

If someone had art for me and a good idea, or wanted to just make art for me, I would be completely willing to do some programming.
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The first demo is pretty terrible in my opinion, in terms of the programming of the character's movement. It feels slow and unresponsive and for some reason pressing left in the air makes you move left really quick though pressing right just acts more like how one might expect.
The slow and unresponsive feeling is often what happens if the acceleration is too slow. You can use an acceleration model of control for the player's movement rather than velocity based and it can make things seem less "jumpy" when they turn around and such, but if the speed cap takes too long to reach it ends up feeling unpleasant.
One of the great things about Cave Story is how finely "pixel" tuned the controls to make it a complete pleasure to play.

The newer demo by the other programmer wouldn't run on my computer, so I can't speak on that one.
 

this game would be best played at a high resolution.

Do you mean low resolution? At a high resolution those characters are practically invisible!