Hint: levels 16, 24, and 27 can be completed (with maximum score) with a single 5-point ball. Level 24 requires excellent aim (make sure your ball trail is perfectly flat before firing), and a quickness on the "Next" button. :)

(I posted this in comments, but it probably should have been here.)

Okay, one more update of per-puzzle scores:

250,230,292,252,410,296,204
307,236,230,250,255,271,220
235,239,240,265,270,234,257
255,280,255,235,275,227,630
244,309

Hint: levels 16, 24, and 27 can be completed (with maximum score) with a single 5-point ball. Level 24 requires excellent aim (make sure your ball trail is perfectly flat before firing), and a quickness on the "Next" button. :)

These are my individual scores, maybe it'll help some folks see where they can find more points:

250,230,292,252,364,296,204,
307,236,230,246,225,271,220,
235,239,240,265,270,234,247,
255,255,250,235,275,227,630,
244,269

Level 28, in particular, can give you a huge boost of extra points.