Lying fatty 8-bit

I drew it back in 2017 on Pixly. I tried to draw something that will be possible to fput it in NES/Famicom game. So there are only 4 colours from NES palette (including the background) and the width of a picture is 256 pixels, as width of NES games.

I also was playing with different colours of NES pallete, but there 5 colours including background, so with those gonna be more problems.