A limited supply. Points come from shots through the hoop in Street Hoops 3D, but the basketballs are counted. When your stock runs out the round is over, so each throw deserves a real aim.
Clean swishes. A ball that drops through without touching the rim earns bonus points, which means a soft, accurate arc pays more than a lucky bounce off the iron.
The fire ball. Sink several shots in a row and the fire ball unlocks. A streak is therefore worth protecting, and one careless miss breaks it.
Reading the 3D court. Distance and height are judged in three dimensions, so repeating a steady motion works better than rushing. Once a new high score is on the board, switch to Two Ball 3D or the calmer 8 Ball Pool Classic.