The concept is ok but there are 2 little problems:

1. The preview image is a reduction of the original so it is not pixel art.
2. The image looks better in 1X size. Try not to submit drawings in 2X or bigger sizes.

If the art is 100% then the preview needs editing to be 1X.

At 3x the pixel flaws just stand out and take away from the whole thing :/

Iactually like the x1 xD

The larger version's body has too much of an empty space in it's body and it distracts from the detailed head.

You can resize it 1/3 then, making sure using nearest neighbor setting (or whatever it's called in Gimp).

thx for reply, later i try make  a better preview image. sry for this =P the other picture is the original size, i pixieled with a 3px brush and grids in gimp.

Looks good, but definitely too big for comfortable viewing. Please upload original size version as we can zoom in with the +/- feature.

Also the preview is bicubic resized, not great. If the x1 piece is larger than 100x100, you might use a cropped close-up instead.