More packs, especially character packs, for these two worlds would be awesome! Your characters are so lively and having 4 directions four you dungeon characters really adds to their dimensionality.
For your dungeon, some creature related packs, where some are conjured up by the wizard would be cool. I always like the traditional large spiders, demons, eye of the beholder, slime characters too.
Do you have plans for other heroes? My vote would be for an archer and magic user.
My suggestion for future assets for the space theme, would be packs to suggest human involvement: furniture, computer desks, scientist lab, lockers, etc and assets to suggest bedrooms, bathroom, etc.), a scientist pack, maintenance crew pack.
If you had considered your space theme to be robot focused only, then perhaps more robots (I think some multi legged, smaller “crawling” droids would be cool).
I see in one of your comments you were interested in working on a space shooter, yet the comment appeared to be after you posted your space themed top-down with robots.
Did you have a side scroller in mind or assets for another space game?
Regardless, I can’t wait to see what you come up with. Your work is outstanding and so inspirational. I can’t decide on if I want to focus on using your dungeon or space theme at this point as they are both very cool.