Hey there! I've loved your asset. Did you have an character and some enemys and bosses?
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Hey there! Sorry for the late reply.
the only tileset that includes some is: https://s4m-ur4i.itch.io/huge-pixelart-asset-pack
this probably won't fit your purpose.
However a set with characters is in the progress (more fantasy than sci-fi tho). But I can't tell how long it will take to finish it.
regards,
Sam