... I've made a game poster and launch image! :D
It was mostly created using assets from the game and some hand warped text, all in Affinity Designer – great app! Object manipulation is so direct and you get instant feedback that you feel so much more in control.
I call it retro-naīve-pulp-scifi style. Obviously inspired by comic books from the 1940's.
* I'm a developer, not a designer.