Nearly every game on this site falls into one of four kinds, and the fastest way to enjoy any of them is to know which one you have opened before you start.
Care sets are the largest group. An animal arrives needing something, tools are supplied, and you work through cleaning, treatment and usually something decorative at the end. The thing most new players miss is that the order is enforced. A dressing will not go over dirt and a brush does nothing on a wet coat, so a stage that refuses to complete is almost always an earlier step you skipped rather than a bug. These take ten to fifteen minutes and nothing in them can be failed.
Simulators put you in the animal’s place in an open world. There is no level structure, so the session is whatever you decide it is — hunting, exploring, building a family. The mistake here is treating the map as a corridor. The interesting parts of these games are usually a long way from where you start, and the first twenty minutes are spent learning to survive the journey rather than making it.
Puzzles are the largest section by count and the most varied. Jigsaws snap when correct; sliding puzzles do not, which makes them considerably harder than the same picture would be. Hidden-object scenes reward a systematic scan over a fast one, and two of the sets here actively penalise speculative clicking.
Arcade games are the short ones. Runs last under a minute, restarts are instant, and every one of them is built around a pattern rather than around randomness — which means a failed attempt is information. Watching one death carefully is usually worth more than three impatient retries.
If you only have a couple of minutes, open something from the arcade section. If you have twenty and want to end up somewhere, open a simulator. If you want to stop thinking, open a jigsaw with a photographic subject and plenty of colour separation — a bird, not a penguin in snow.