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This is a simple vector design I created by using one of my vintage 1980s LEGO Classic Space minifigures as a reference photo. The overall theme is similar to classic pop-art design, and somewhat inspired by the 1982 Queen album Hot Space. If my design looks way too simple and basic, keep in mind that I created this with the specific purpose of being a T-shirt or sticker with simplified artwork, hence the lack of detail.
I made a slight revision of this design for graffiti stickers in big cities. These graffiti versions are larger and tackier, and used two spacemen along with simple shapes of LEGO bricks. These ones use a simpler primary color scheme: