I have new respect for the Canadarm operators...
http://bildschirmarbeiter.com/output_7761.html
Seems like "planning the arc in advance" is a key -- like in that "spiderman" swinging game.
Level 11 was tough, 15 was kinda fun (ooo, it's gonna catch up to me...), and 16-19 were just harder versions of 15 (i.e. MOVING obstacles!).
Got to 20 with only a single life, argh! 816 points. But not as good as the 2200 points in the top 10 :(
PS: I doubt the Canadarm operators are similarly confined and to make it worse have fast-moving objects to avoid in that confined space ;)