I've been playing some casual games as part of the Apple Arcade trial subscription, and have really been enjoying Hexaflip by Rogue Games. One part Q-Bert, one part Marble Madness, one part platform runner.
It's a deceptively simple game - there are only two “controls” - tap left and tap right. No forward or backward. No jump. Just left and right, always moving forward. Some of the tiles can change your direction, so you have to plan accordingly. It gets complicated quickly.
It does have some in-game currency, which I usually find intolerable. It's only used to optional restart a level from a save point, but it's still annoying. Collecting coins and skins is just tacky.