I have something)
1) GALA - https://dimalink.itch.io/gala
It is simple arcade space shooter, inspired by 80s machines. And Space Invaders and Galaga. Welcome to space! It is not hard game))
Also, you can see some my art - like imaginative cartridge))))) Imaginative box art.
http://www.dimalink.tv-games.ru/galaarteng
And manual in PDF))))) In retro style) But in color!
2) Distant Outpost - it is levels for GZDOOM or ZDOOM port of DOOM.
This is 6 levels, in style of base. Some dark, some some action to shoot.
IndieDB - https://www.moddb.com/games/doom-ii/addons/distantoutpost