Pizza Tower (CYOP) - Lap 3 Deep Dish In Hell
This one is moderately hard; the room with the ON/OFF switch requires some fast movement, and it took me a short while to figure out an easier way to go around Pizzaface in the one room where I take the secret (got it first try after figuring that out), but if you don't it's real tight. Good level.
WeirdManGuy Tower: https://gamebanana.com/mods/461231
Tatsuu's Lapping for CYOP: https://gamebanana.com/mods/468188