I’m a huge fan of the games done by Eyezmaze, particularly the “Grow” series. The basic premise is that every item can influence other items… and the gameplay is more about discovering what order to place things in.
The fun for me is seeing how things change each time, and trying to find that just-right order. These games absolutely encourage exploration, and it’s a blast to watch things develop and unfold, with each decision you make.
PS: Tontie is quite killer. I’ve lost hours to that game, easily.