Hidden Lands

Picture a cluster of floating islands rendered in 3D, and you're picking through the scenery for hidden objects while working through separate puzzle stages tied to the story of a vanished civilization. There are over 100 stages in total, so the game alternates between the two modes rather than sticking to one all the way through. The pace stays unhurried - soft music, no countdown pressure - which suits playing in short stretches rather than pushing through a lot of levels at once.