Yes, actually I’ve noticed that the exported spritesheet from PICO-8 misses one foot in the fall sprite due to it sticking out.
So I’ve uploaded the arranged spritesheet with the fixed foot as “picosonic sonic spritesheet (arranged) - pink background v6.0.png” (mostly useful for PICO-8 users; they should set transparency color to pink) and a variant “… transparent background v6.0.png” with a transparent BG (you’ll probably want that considering you’re gonna change the colors anyway).