I definitely recommend to give Stacks:Space and Stacks:Jungle a try. Stacks:Space was my first game - kinda like Stacklands but with aliens, lasers and bots, while Stacks:Jungle is an attempt to make a 100% peaceful exploration-based Stacklands-like game in a spirit of the “Jungle Cruise”.
Note that Stacks:Space was made six months after the release of Stacklands, so it is technically the oldest Stacklands-like game, released LONG before Witchhand, Card Age, or Paper Kingdom :)
Space and Jungle were on sale for $5 at Steam and Itch until Dec’2024. Did not sell nearly as well as Stacklands or Witchhand for obvious reasons (earned less than my monthly salary in total), but I don’t really worry about sales. I really liked the new genre and I will definitely make more Stacklands-like games (eventually).