i believe being unproductive (what the jam wants you to be) allows you to make a game look like it was made unproductive therefore allows you to use different artistic techniques on every sprite because thats unproductive. just because you dont like how some people are making their games look doesnt mean you have to criticize it. thats just my opinion, but this comment might be too diffucult to process for you as a reader, and may effect your brains performance. For these reasons, its important to read what the jam is about and consider that different artistic techniques may correlate to the game jam's theme.