I only have one 1x1 pixel texture in my game. Everything you see in my game consists out of multiple stretched squares with the same black 'texture' and 3 different transparency levels. I am not good at drawing sprites :D
https://itch.io/jam/gmtk-2019/rate/461649
Texturing is such a massive time sink, I reckon it's wise to avoid it in a jam setting wherever you can.
(I am also not good at drawing sprites.)