I have submitted a work for the gallery but it was rejected since it the admin saw that it wasnt done manually but the art work was done with pencil tool with paint tool sai and than revisited with 1pixal brush inside MyPaint Open source and this is the art work, and i resized it since i couldnt submit the file as 100x100 the original was 192x192



so i need to clearfy the problem :)

alright? but now how should i resubmit? should i revisit the artwork? please guide me?

Oh, that won't work at all, I had to send it back again or the natives will go on a rampage. You need to go back to the original pixelled version. What you did there is considered a terrible thing in pixelart because you did not 'control' the finished piece.
This has happened many times to those new to pixeart and pixelart output. Its most likely that in your original saving attempt you corrupted the pixels beyond repair and this piece is un-salvageable unless you remake it :(

*If you work in Photoshop to pixel make sure you see the post about setting your app to pixel and to make sure which tools need which settings. You can find that in the n00btorial thread.

You are fine with format and file output :)

Take your new piece to the WIP section if you need help or feedback. At the moment its ok but needs polishing and cleaning. I personally think this is far too big a canvas but its your work. Because its this big then all messy bits will show up more. Keep in mind that you are pixelling not painting or coloring.