Hidden Objects Brain Teaser is a search-and-find game: each scene is packed with detail and you're given a list of items to locate within it. There's no combat, no timer in the standard mode, and no penalty beyond the time it takes.
The genre is more absorbing than it sounds — the pleasure is entirely in the moment your eye finally resolves something you've been looking past for a minute.
The standard mode isn't, which makes it one of the more relaxing genres. Some builds offer a timed challenge mode as an option.
Scan in systematic bands rather than looking around freely, and search for partial shapes and colours — most items are deliberately half-hidden behind something else.
Yes — tap to zoom and collect. Nothing to install.