Relax

Not every game wants something from you. These are happy being background - something to do with your hands while you're paying attention to something else entirely, and they won't mind.

Tidy Up - Satisfeel ASMR is the clearest example, built entirely around the satisfaction of putting things where they belong. Bubble Shooter Butterfly and Mahjong Christmas Holiday are familiar formats with the pressure taken out, and Number Merge Master ticks along at whatever pace you set. Tiles of the Unexpected 2 asks slightly more of you without ever becoming demanding about it. None of them are competing for your attention, which is exactly what makes them work when something else already has it.

There are 19 free games under this tag, all playable in the browser with nothing to install, and none of them will punish you for walking away mid-level.

The gentler puzzle formats are in Puzzle games, and No Blood games filters for anything without conflict in it at all.