This Planarity Flash Game will probably make some of you cry. Then there's me (and geeks like me).... I love spacial games.
I got through level 7 with a score of 11567 level 8 with a score of 23088 before I forced myself to stop.
Later: After level 11 (Score: 199554 -- It took 21.5 minutes for me to do that one!) the ActionScript caused a prompt in FireFox giving me the option to cancel because it was running so long. Te-he!
Even Later: Level 12 took almost half an hour (Score: 402599), so I think it's time to give up the chase.