Theo loves rollercoasters
He's been making drawings of them for years now, here are some older ones.

He also knows many minute details on various rollercoasters world-wide. At some point I figured I wanted to help him make these drawings come to life. So we've been making a little 2d rollercoaster game thingie.
The weirdest issue i had thinkng about it was how to solve the issue where you are drawing a 2d thing and it has some 3d properties, notably the flipping parts / or screws. It's solved very simple, so that is nice.
The thing is very much not illustrated (yet)
I've since redone it for my little fantasy console, dreamengine, and you can play that version right in your browser here: play the coaster.

Let's see where it goes.