Bird Games

Because most use a single input against continuous gravity. There's no way to slow down or correct gradually - every tap is a discrete decision, and a mistimed one can't be walked back.

Spot Differences Bird Adventure, easily. It has nothing to do with flying at all - you are comparing two images at your own pace with no failure state.

Flying while stacking. Each thing you collect adds to a tower beneath you, which changes your shape and what you can fit through, so growth is both progress and a problem.

Tap more often and more gently than feels right. Most players climb too hard and then have to fall a long way, when a steady rhythm of small taps keeps you far closer to the middle.

Yes, all of them run free in your browser with nothing to install and no account needed before you start, however many attempts it takes you.