Every time a new challenge is posted we also post the voting for the previous week and another post with the winners from the last challenge.
No. Every week the challenge has new rules.
They are posted every week on Monday in the front page of the gallery...scroll down.
There is also every week a thread just for the challenges in the forum where one gets help or has questions answered.
Both say whatever rules or restriction apply for the week and they always change.
oh, i didn't know 
. Okay... next time i make in the 32x32 size. All the Challenges have this max size? I'm new here and i rarely post pixelarts here too so i don't know the rules
oh, oh!
Challenge is 32x32max in size.
This will be added to your gallery but not the challenge.
kudos on trans BG 
ok, i get it