It would be great to see more 3D spatial visualization and things that
appeal to girls in particular.

Some do exist, but there is always room for more. These can be
gender-neutral, just not a big turn-off for girls.

Some spatial awareness puzzles
http://samgine.com/free/spatial-awareness-puzzles/

Lots of games here, some could be considered pre-engineering
http://www.abcya.com/

Not sure that this is actually a “game” but coloring is big and these are great
https://www.theguardian.com/science/alexs-adventures-in-numberland/2017/may/01/the-colour-of-numbers-visions-of-our-mathematical-universe

Girls often struggle in early engineering programs because they don’t
have as strong spatial visualization skills as boys with much lower
GPAs. Some engineering schools are finding ways to address this based
on work in
Introduction to 3D Spatial Visualization: An Active Approach
by Sheryl Sorby, Anne Frances Wysocki, Beverly J Baartmans
Lots of good material. It would need to be adapted.
https://www.alibris.com/Introduction-to-3D-Spatial-Visualization-An-Active-Approach-Sheryl-Sorby/book/7429748