Hoops

thirty seconds. flick them in.

arcade basketball: flick balls at the hoop for 30 s; in the last 10 the hoop slides

An arcade basketball machine gives you thirty seconds. The flick's direction aims and its speed sets the arc, and in the last ten seconds the hoop slides, so a good shot leads it.

Concepts: projectile, trajectory, gravity.

An interactive you play with one thumb, on Wundr.