The 64k compo was particularly weak this year. I'd recommend checking out the 4k intro and 4k executable graphics compos for some stellar work.
At Revision 2015 to 2017, the PC 64k compo was absolutely insane, with production values exceeding pretty much every other category, including unconstrained PC demos. If 4k is the new 64k, 64k at that time became the new PC demo.
256 bytes is the big (hum...) thing now. With one ridiculous entry that managed to pack 8 different effects, with music and transitions https://www.pouet.net/prod.php?which=85227
https://www.pouet.net/prod.php?which=81021 https://www.pouet.net/prod.php?which=81015 https://www.pouet.net/prod.php?which=80996