Simple and cute! Welcome to the picoJAMs

You really delivered on the "A tiny modeller for tiny models" slogen here. It is cute, and a good first model! 

For texturing I started using Piskel where you can turn on a 2 pixel grid as a guide. In picoCAD the smallest movement you can do while uv mapping is 2 pixels, so it helps to prepare for that while drawing your textures.

Also I like the automobile theme you suggested :)

Very cute!